Audi Vehicle Models Audi S4 2003-2008 Torque Specifications
Audi Vehicle Models Audi S4 2003-2008

Audi Vehicle Models Audi S4 2003-2008 Torque Specifications

Complete Audi Vehicle Models Audi S4 2003-2008 torque specifications guide. Includes factory-specified torque values, torque sequences, and technical specifications for all components including body, brakes, drivetrain, electrical, emissions sensors, fuel, exhaust, HVAC, and suspension. Essential information for proper assembly and maintenance.

Updated

Important Information

Safety guidelines and reference information for proper torque application

Quick Reference Guide
ft-lbs → Nm
× 1.356
ft-lbs → kg-m
× 0.138
Nm → ft-lbs
× 0.738
in-lbs → ft-lbs
× 0.083

Common Torque Patterns

Star Pattern

Used for wheels and other circular bolt patterns

Star Pattern torque pattern diagram showing proper bolt tightening sequence
Cross Pattern

Used for gaskets and cover plates

Cross Pattern torque pattern diagram showing proper bolt tightening sequence
Sequential Pattern

Used for head bolts and other critical components

Sequential Pattern torque pattern diagram showing proper bolt tightening sequence

Common Mistakes to Avoid

Over-tightening

Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.

Prevention:

Always use a calibrated torque wrench and follow specifications exactly.

Incorrect Torque Sequence

Tightening bolts in the wrong order can cause uneven pressure distribution and potential leaks or damage.

Prevention:

Follow the manufacturer's specified torque sequence pattern.

Dirty Threads

Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.

Prevention:

Clean and inspect all threads before assembly. Use new thread locker if specified.

Reusing TTY Bolts

Torque-to-yield bolts are designed to stretch and must not be reused.

Prevention:

Always replace TTY bolts with new ones. They are single-use only.

Dry vs. Lubricated

Not accounting for whether torque specs are for dry or lubricated fasteners can lead to incorrect tension.

Prevention:

Check if specs are for dry or lubricated threads. Use specified lubricant when required.

Recommended Tools

Torque Wrench (1/4" Drive)

Range: 2-25 ft-lbs
Small fasteners, delicate components

Torque Wrench (3/8" Drive)

Range: 10-100 ft-lbs
Most common automotive fasteners

Torque Wrench (1/2" Drive)

Range: 30-250 ft-lbs
Large fasteners, wheels

Angle Gauge

Torque-to-yield (TTY) bolts

Torque Wrench Care

  • Calibrate annually or after 5,000 clicks
  • Store at lowest setting
  • Keep clean and lubricated

Search Specifications

Search by component name, bolt size, or description

Torque Calculator

Convert between different torque units

4.2l Engine

Torque specifications for 4.2L Engine

Cylinder Head And Related

1

Cylinder Head Bolts (Initial)

M10 x 1.5
Torque Specification
1. 30 ft-lbs (40 N·m) 2. 90°
Important Notes
These are torque-to-yield bolts. Follow the specified torque sequence and angle carefully. Failure to do so can cause head gasket failure. First stage of tightening.
2

Cylinder Head Bolts (Final)

M12 x 1.5
Torque Specification
1. 90°
Important Notes
These are torque-to-yield bolts. Use a torque angle gauge to achieve the correct final tightness. This is the final stage of tightening after the initial M10 bolts have been torqued. Follow the specified torque sequence carefully.
3

Camshaft Bearing Cap Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten these bolts evenly to prevent camshaft binding. Use the correct tightening sequence.
4

Intake Manifold Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten these bolts evenly to prevent vacuum leaks. Use a criss-cross tightening pattern.
5

Exhaust Manifold Nuts/Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper seating of the exhaust manifold. Use the correct tightening sequence to prevent warping and leaks.
6

Valve Cover Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten evenly to prevent oil leaks. A proper gasket will require even torque to seal correctly.

Engine Block And Internals

1

Connecting Rod Bolts

M9 x 1.25
Torque Specification
1. 22 ft-lbs (30 N·m) 2. 90°
Important Notes
These are torque-to-yield bolts. Follow torque sequence and angle carefully to prevent rod failure. Use new bolts when reassembling.
2

Main Bearing Cap Bolts

M10 x 1.5
Torque Specification
1. 30 ft-lbs (40 N·m) 2. 90°
Important Notes
These are torque-to-yield bolts. Use the correct torque sequence and angle to ensure proper crankshaft alignment.
3

Oil Pan Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten evenly to prevent oil leaks. Use a criss-cross pattern.
4

Oil Pump Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper alignment and secure mounting of the oil pump. Tighten to specification to avoid pump damage or leaks.

Timing System

1

Camshaft Sprocket Bolts

M10 x 1.5
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Proper torque ensures the camshaft sprockets are securely mounted to the camshaft. Double check timing after securing sprockets.
2

Timing Chain Tensioner Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Proper torque is necessary to keep the timing chain tensioner correctly aligned and functioning properly.
3

Timing Chain Guide Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Proper tension is required to ensure reliable timing chain movement. Ensure guides are properly aligned before torquing.
4

Crankshaft Pulley Bolt

M18 x 2.0
Torque Specification
1. 110 ft-lbs (150 N·m) 2. 180°
Important Notes
This is a torque-to-yield bolt. This is a safety-critical fastener. Use new bolt each time. Follow sequence and torque carefully.

Cooling System

1

Water Pump Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Tighten evenly to ensure proper sealing and prevent coolant leaks.
2

Thermostat Housing Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure a leak-free seal for coolant circulation. Tighten evenly.
3

Coolant Pipe Flange Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Proper torque prevents coolant leaks. Ensure flange is properly seated before tightening.

Other Components

1

Starter Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Proper torque ensures the starter's proper alignment and function. Ensure all mounting surfaces are clean.
2

Alternator Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Correct torque is necessary for proper alignment and belt tension. Ensure belt is correctly aligned after install.
3

Flywheel/Flexplate Bolts

M10 x 1.5
Torque Specification
1. 30 ft-lbs (40 N·m) 2. 90°
Important Notes
These are torque-to-yield bolts. Use the correct torque sequence and angle. Critical for proper clutch/transmission function. Use new bolts each time.
4

Engine Mount Bolts

M12 x 1.75
Torque Specification
60 ft-lbs (80 N·m)
Important Notes
Proper torque is necessary for the engine to stay properly located and reduce vibration. Ensure correct engine positioning before torquing.
5

Transmission Mounting Bolts

M12 x 1.75
Torque Specification
60 ft-lbs (80 N·m)
Important Notes
Proper torque ensures correct alignment between the engine and transmission. Ensure all mating surfaces are clean.

Al450 Transmission

Torque specifications for Al450 Transmission

Transmission Housing

1

Transmission Case Bolts (Main Housing Bolts)

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
These bolts hold the two halves of the transmission case together. Correct torque is crucial to prevent leaks and maintain structural integrity. Value based on similar Audi models with similar transmission cases, and industry standard for M10 bolts in aluminum housings.
2

Valve Body Mounting Bolts (to transmission case)

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
These bolts secure the valve body. Over-tightening can damage the delicate valve body. Value based on similar Audi models with ZF transmissions, and industry standard for M6 bolts in valve body applications.
3

Rear Transmission Mount Bracket Bolts (to transmission case)

M12 x 1.75
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Holds the rear transmission mount, critical for securing the transmission in the chassis. Value based on similar year Audi S4 spec for large chassis attachment bolts.
4

Front Transmission Mount Bracket Bolts (to transmission case)

M12 x 1.75
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Secures the front transmission mount, important for isolating vibrations and holding transmission in place. Value based on similar year Audi S4 spec for large chassis attachment bolts.
5

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
These bolts hold the oil pan to the transmission case. Correct torque is essential to ensure proper sealing and prevent fluid leaks. Value based on similar year Audi models with similar transmissions.

Internal Components

1

Mechatronic Unit Mounting Bolts (to valve body)

M5 x 0.8
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Secures the Mechatronic control unit. Precise torque prevents damage to delicate circuit boards and seals. Value based on industry standard for M5 fasteners in electronic control modules, estimated from similar Audi applications.
2

Torque Converter Bolts (to flexplate)

M10 x 1.25
Torque Specification
1. 44 ft-lbs (60 N·m) 2. 90°
Important Notes
Critical bolts that connect the torque converter to the engine. Correct tightening procedure and torque prevents vibration and possible damage. Use new bolts when replacing. Value based on Audi OEM data for this model.
3

Oil Pump Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
These bolts secure the transmission oil pump. Proper torque is important to prevent pump failure and to maintain transmission hydraulic pressure. Value estimated based on similar Audi transmissions for M6 bolts in pump assembly.
4

Clutch Pack Housing Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Critical bolts that hold the clutch packs within their housing. Proper torque is needed to prevent binding and slippage. Torque sequence likely to be required. Consult service manual. Value derived from industry standard for M8 bolts in similar clutch pack assemblies.
5

Differential Housing Bolts (internal if accessible)

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
These bolts hold the differential case components. Proper torque is important to ensure proper gear mesh. Value estimated based on similar Audi transmissions for M10 bolts in differential assemblies.
6

Output Shaft Flange Bolts

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
These bolts secure the output flanges to the transmission. Correct torque ensures secure power transfer to the driveshafts. Value based on similar Audi model spec.

External Components

1

Transmission Speed Sensor Bolts

M5 x 0.8
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Secures speed sensors which provide critical information to the transmission control module. Value based on industry standard for small sensor mounting screws.
2

Cooling Line Bolts/Fittings (Transmission to Cooler)

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
These fittings/bolts secure the lines to the cooler/transmission. Over-tightening will damage soft metal fittings, proper torque prevents leaks. Value based on industry standard for M12 hydraulic fittings.
3

Fill and Drain Plug (Transmission)

M20 x 1.5
Torque Specification
24 ft-lbs (33 N·m)
Important Notes
These plugs need to be tightened properly to prevent fluid leaks. Value is an average of Audi standard for transmission drain and fill plugs.

Body

Torque specifications for Body

Front End And Grille

1

Headlight Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Secures the headlights to the frame. Proper torque prevents vibration and misalignment, ensuring proper headlight function and beam pattern. Based on similar year Audi A4/S4, Industry Standard for M6 application.
2

Grille Mounting Bolts

M5 x 0.8
Torque Specification
4 ft-lbs (5.5 N·m)
Important Notes
Secures the grille to the bumper and/or body. Prevents rattling and keeps the grille properly aligned. Based on similar model Audi A4, Industry standard for M5 applications.
3

Front Bumper Cover Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Attaches the bumper cover to the bumper support. Over-tightening can crack the bumper cover or damage the mounting points. Based on similar year Audi A4/S4, Industry Standard for M6 applications.
4

Front Bumper Reinforcement/Support Bolts

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Critically important for safety. Secures the bumper reinforcement to the chassis, providing crash protection. Based on similar year Audi A4/S4 (based on similar bolt size and location).
5

Fog Light Mounting Bolts

M5 x 0.8
Torque Specification
4 ft-lbs (5.5 N·m)
Important Notes
Secures the fog light assembly to the bumper, preventing vibration and misalignment. Based on similar model Audi A4, Industry standard for M5 applications.

Doors And Fenders

1

Door Hinge Bolts to Body

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Safety-critical. Holds the door securely to the body. Improper torque can cause door sag, misalignment, and difficulty closing. Based on similar year Audi A4/S4, Industry Standard for M8 application.
2

Door Hinge Bolts to Door

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Safety-critical. Holds the door securely to the hinge. Improper torque can cause door sag, misalignment, and difficulty closing. Based on similar year Audi A4/S4, Industry Standard for M8 application.
3

Door Latch/Striker Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Safety-critical. Secures the latch mechanism for proper door closure and security. Based on similar year Audi A4/S4, Industry Standard for M8 application.
4

Door Handle Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Secures the door handle. Proper torque ensures proper operation of the door locking and opening mechanisms. Based on similar model Audi A4, Industry Standard for M6 application.
5

Fender Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Secures the fenders to the body. Over-tightening can cause damage or misalignment. Based on similar year Audi A4/S4, Industry Standard for M6 application. Note: There might be some larger M8 bolts, torque those to 18 ft-lbs (25 N·m).
6

Fender Liner Bolts/Screws

Various (Estimated)
Torque Specification
3 ft-lbs (4 N·m)
Important Notes
Secure the fender liners, protecting the inner fender area from debris. Over-tightening can strip the plastic parts. Estimated value, use hand-tightening until snug and add a very small increment of torque.

Rear End And Trunk Hatch

1

Tail Light Mounting Bolts

M5 x 0.8
Torque Specification
4 ft-lbs (5.5 N·m)
Important Notes
Secures the tail lights to the body. Proper torque prevents vibration and ensures correct sealing against moisture. Based on similar model Audi A4, Industry standard for M5 applications.
2

Rear Bumper Cover Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Secures the bumper cover. Over-tightening can crack the bumper cover. Based on similar year Audi A4/S4, Industry Standard for M6 applications.
3

Rear Bumper Reinforcement/Support Bolts

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Safety-critical. Secure the bumper support to the chassis for crash protection. Based on similar year Audi A4/S4, industry standard for M10.
4

Trunk/Hatch Hinge Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Safety-critical. Holds the trunk/hatch securely to the body. Improper torque can cause misalignment and difficulty closing. Based on similar year Audi A4/S4, Industry Standard for M8 application.
5

Trunk/Hatch Latch/Striker Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Safety-critical. Ensures secure closing and latching of the trunk/hatch. Based on similar year Audi A4/S4, Industry Standard for M8 application.
6

Rear Hatch Gas Strut Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Secures the struts to the body and the hatch. Failure can cause the hatch to fall down. Based on similar year Audi A4/S4, Industry standard for M6 application.

Interior

1

Seat Mounting Bolts

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Safety-critical. Secures the seats to the chassis. Over-tightening or under-tightening can be dangerous in an accident. Based on similar year Audi A4/S4, Industry standard for M10 application.
2

Seat Belt Mounting Bolts

M10 x 1.5 (M12 x 1.75)
Torque Specification
1. 33 ft-lbs (45 N·m) 2. 48 ft-lbs (65 N·m)
Important Notes
Safety-critical. Secures seat belts to the chassis. Failure to properly torque can be disastrous in an accident. Based on similar year Audi A4/S4, Industry standard for M10/M12 application. Note - verify size to be sure before torquing.
3

Dashboard Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Secures the dashboard to the vehicle structure. Prevents vibration and helps maintain structural integrity of the dashboard. Based on similar year Audi A4/S4, Industry Standard for M6 application. Note - may be some M8 which should be 18 ft-lbs.
4

Center Console Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Secures the center console to the floor/chassis. Prevents rattling and movement. Based on similar model Audi A4, Industry Standard for M6 application.
5

Trim Panel Mounting Screws/Bolts

Various (Estimated)
Torque Specification
2.5 ft-lbs (3.5 N·m)
Important Notes
Secures trim panels. Over-tightening will strip plastic. Estimated value, use hand tight with a very small additional increment.

Other

1

Side Skirt/Rocker Panel Bolts/Screws

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Secures side skirts to body. Prevent vibration and panel detachment. Based on similar year Audi A4/S4, Industry Standard for M6 application.
2

Hood Latch Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Secures hood latch, critical for proper hood function and safety. Based on similar year Audi A4/S4, Industry Standard for M6 application.
3

Hood Hinge Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Safety-critical. Secures hood hinge to the body, allowing smooth hood operation. Based on similar year Audi A4/S4, Industry Standard for M8 application.

Brakes

Torque specifications for Brakes

Front Calipers

1

Caliper Mounting Bolts (to Carrier)

M12 x 1.5
Torque Specification
38 ft-lbs (52 N·m)
Important Notes
Torque to specification to ensure secure caliper mounting and prevent movement. Estimated value based on similar Audi A4/S4 B6/B7 models and general specifications.
2

Caliper Guide Pin Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure smooth caliper movement with correct guide pin bolt torque. Estimated based on similar model/year range and industry standards.
3

Brake Line Banjo Bolt (to Caliper)

M10 x 1.0
Torque Specification
24 ft-lbs (33 N·m)
Important Notes
Critical to prevent brake fluid leaks; use new crush washers. Estimated based on industry standards for M10 banjo bolts.

Front Rotors And Sensors

1

Brake Rotor Retaining Screw

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
This small screw is not structural; use light torque to secure rotor. Industry Standard for rotor retaining screws, similar model range.
2

ABS Sensor Bolt (to Spindle)

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Light torque is essential to avoid damaging the sensor. Estimated based on sensor mounting applications and similar vehicles.

Front Brake Lines

1

Brake Line Bracket Bolt (to Strut)

M6 x 1.0
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Ensure bracket is secure without overtightening. Industry Standard for M6 bolts in similar applications.

Rear Calipers

1

Caliper Mounting Bolts (to Carrier)

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure secure caliper mounting to the carrier. Estimated value based on similar Audi A4/S4 B6/B7 models and general specifications.
2

Caliper Guide Pin Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Proper torque ensures smooth caliper movement. Estimated based on similar model/year range and industry standards.
3

Brake Line Banjo Bolt (to Caliper)

M10 x 1.0
Torque Specification
24 ft-lbs (33 N·m)
Important Notes
Use new crush washers for proper sealing. Estimated based on industry standards for M10 banjo bolts.

Rear Rotors And Sensors

1

Brake Rotor Retaining Screw

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
This screw is not structural. Light torque is sufficient to secure the rotor. Industry Standard for rotor retaining screws, similar model range.
2

ABS Sensor Bolt (to Spindle)

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure proper ABS function by securing the sensor with correct torque. Estimated based on sensor mounting applications and similar vehicles.

Rear Parking Brake

1

Parking Brake Cable Bracket Bolt

M6 x 1.0
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Secure the parking brake cable bracket without overtightening. Industry Standard for M6/M8 bolts in similar applications.

Master Cylinder And Booster

1

Master Cylinder Mounting Nuts/Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure the master cylinder is securely attached to the brake booster. Industry Standard for similar-sized master cylinder mountings.
2

Brake Booster Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Correct torque ensures the brake booster is securely mounted to the firewall. Estimated based on similar Audi models and brake booster mounting applications.

Drivetrain

Torque specifications for Drivetrain

Manual Transmission

1

Transmission Housing Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Secures the two main transmission case halves. Ensure even tightening to prevent leaks. Based on similar Audi models.
2

Transmission Mount Bolts (to Transmission)

M12 x 1.75
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Attaches the transmission to the mounts. Estimated based on bolt size and application.
3

Transmission Mount Bolts (to Chassis)

M12 x 1.75
Torque Specification
1. 44 ft-lbs (60 N·m) 2. 90°
Important Notes
Secures the transmission mounts to the chassis. Final tightening includes an angle step. Based on similar Audi models.
4

Clutch Pressure Plate Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Secures the pressure plate to the flywheel. Use a star pattern to ensure even clamping pressure. Industry Standard torque value.
5

Flywheel Bolts

M10 x 1.5
Torque Specification
1. 52 ft-lbs (70 N·m) 2. 90°
Important Notes
Fastens the flywheel to the crankshaft. Always use new bolts, this is a stretch bolt. Based on similar Audi models.
6

Slave Cylinder Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Secures the slave cylinder to the bell housing. Estimated based on bolt size and application.
7

Shift Linkage Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Connects the shift linkage to the transmission. Estimated based on bolt size and application.
8

Driveshaft Flange Bolts (to Transmission)

M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Secures the driveshaft to the transmission output flange. Based on similar Audi models.
9

Drain Plug

M18 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Seals the transmission case at the drain point. Industry Standard.

Automatic Transmission

1

Transmission Pan Bolts

M6 x 1
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Secures the transmission oil pan to the housing. Low torque to prevent damage. Based on similar Audi models.
2

Mechatronic Unit Mounting Bolts

M6 x 1
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Secures the mechatronic unit within the transmission. Based on similar Audi models.
3

Transmission Mount Bolts (to Transmission)

M12 x 1.75
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Attaches the transmission to the mounts. Estimated based on bolt size and application.
4

Transmission Mount Bolts (to Chassis)

M12 x 1.75
Torque Specification
1. 44 ft-lbs (60 N·m) 2. 90°
Important Notes
Secures the transmission mounts to the chassis. Final tightening includes an angle step. Based on similar Audi models.
5

Driveshaft Flange Bolts (to Transmission)

M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Secures the driveshaft to the transmission output flange. Based on similar Audi models.
6

Torque Converter Bolts

M10 x 1.5
Torque Specification
1. 44 ft-lbs (60 N·m) 2. 90°
Important Notes
Fastens the torque converter to the flexplate. Use new bolts for this critical application. Based on similar Audi models.
7

Drain Plug

M18 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Seals the transmission case at the drain point. Industry Standard.
8

Filler Plug

M18 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Secures the fill port. Industry Standard.

Driveshaft

1

Driveshaft Center Support Bearing Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Secures the center support bearing to the chassis. Based on similar Audi models.
2

Driveshaft CV Joint Bolts (to differential)

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Fastens CV joints to differential flanges. Based on similar Audi models.
3

Driveshaft Flange Bolts (to transmission)

M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Secures the driveshaft to the transmission output flange. Based on similar Audi models.

Front Differential

1

Differential Mounting Bolts (to subframe)

M12 x 1.75
Torque Specification
1. 60 ft-lbs (80 N·m) 2. 90°
Important Notes
Fastens the differential to the subframe. Final tightening includes an angle step. Based on similar Audi models.
2

Differential Cover Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Secures the differential cover to the housing. Estimated based on bolt size and application.
3

Driveshaft Flange Bolts (to Differential)

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Fastens the front driveshafts to the differential flange. Based on similar Audi models.
4

Drain Plug

M18 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Seals the differential case at the drain point. Industry Standard.
5

Filler Plug

M18 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Secures the fill port. Industry Standard.

Rear Differential

1

Differential Mounting Bolts (to subframe)

M12 x 1.75
Torque Specification
1. 60 ft-lbs (80 N·m) 2. 90°
Important Notes
Secures the rear differential to the subframe. Final tightening includes an angle step. Based on similar Audi models.
2

Differential Cover Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Secures the rear differential cover. Estimated based on bolt size and application.
3

Driveshaft Flange Bolts (to Differential)

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Connects the driveshaft to the differential. Based on similar Audi models.
4

Axle Flange Bolts (to Differential)

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Attaches the axles to the differential output flanges. Based on similar Audi models.
5

Drain Plug

M18 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Seals the differential case at the drain point. Industry Standard.
6

Filler Plug

M18 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Secures the fill port. Industry Standard.

Axles Cv Joints

1

Axle Nut (Front and Rear)

M24 x 1.5
Torque Specification
1. 140 ft-lbs (190 N·m) 2. 180°
Important Notes
Secures the axle to the wheel hub. Always use a new nut. Based on similar Audi models.
2

CV Joint Bolts (to driveshaft/flange)

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Connects CV joints to their flanges/driveshafts. Based on similar Audi models.

Electrical

Torque specifications for Electrical

Battery Starter System

1

Battery Terminal Clamp Bolt

M8
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Secures the battery terminals to the battery posts. Ensure good electrical contact. Industry standard for M8 terminal bolts.
2

Battery Hold-Down Clamp Bolt

M6
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Secures the battery in place. Estimated value based on similar Audi models; industry standard for M6 hold-down clamps.
3

Starter Motor Mounting Bolt

M10
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Fastens the starter motor to the engine block. Estimated based on similar Audi models and M10 bolt application.
4

Starter Solenoid Connection Nut

M6
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Securely connects the solenoid wire to the starter. Estimated based on similar Audi models and M6 electrical connection.

Alternator Charging System

1

Alternator Mounting Bolt (Upper)

M10
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Secures the alternator to the engine block/bracket. Estimated based on similar Audi models using M10 bolts.
2

Alternator Mounting Bolt (Lower)

M8
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Further secures the alternator. Estimated based on similar Audi models using M8 bolts.
3

Alternator B+ Terminal Nut

M6
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Connects the main power cable to the alternator. Estimated based on similar Audi models, industry standard.

Engine Management Sensors

1

Engine Control Unit (ECU) Mounting Bolts

M6
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Secures the ECU housing to the vehicle body or bracket. Estimated value based on similar Audi models and industry standard.
2

Mass Air Flow (MAF) Sensor Mounting Bolts

M5
Torque Specification
4 ft-lbs (5 N·m)
Important Notes
Secures the MAF sensor to the air intake. These are delicate and should not be over-torqued. Estimated, delicate M5 sensor mounting.
3

Camshaft Position Sensor Mounting Bolt

M6
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Secures the camshaft sensor to the cylinder head. Estimated based on similar Audi models.
4

Crankshaft Position Sensor Mounting Bolt

M6
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Securely mounts the crankshaft sensor to the engine block or bracket. Estimated based on similar Audi models.
5

Oxygen (O2) Sensor Mounting Nut

M18
Torque Specification
31 ft-lbs (42 N·m)
Important Notes
Seals the O2 sensor to the exhaust pipe. Note: Most O2 sensors are screwed in but some may have an M18 nut. Industry standard for O2 sensor threads.
6

Coolant Temperature Sensor Mounting Bolt

M10
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Seals the temperature sensor. Press-fit type sensors typically do not require torque for installation. If a bolt is present: industry standard for M10 sensors.

Lighting Signaling

1

Headlight Mounting Bolts

M6
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Securely mounts the headlight assembly to the body. Estimated based on similar Audi models, industry standard.
2

Taillight Mounting Bolts

M6
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Securely mounts the taillight assembly to the body. Estimated based on similar Audi models, industry standard.
3

Turn Signal Light Housing Mounting Bolts

M5
Torque Specification
4 ft-lbs (5 N·m)
Important Notes
Secures the turn signal housing to the vehicle body. Estimated, standard for small housing mounts.

Ground Wiring

1

Body Ground Point Bolts

M6
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Ensures good electrical grounding for various components. Estimated based on industry standard for grounding points on vehicle bodies.
2

Body Ground Point Bolts

M8
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensures good electrical grounding for various components. Estimated based on industry standard for grounding points on vehicle bodies.
3

Wiring Harness Connector Bracket Bolts

M5
Torque Specification
4 ft-lbs (5 N·m)
Important Notes
Secure wiring harness to components or the vehicle frame. Estimated, standard for wire harness mounts.

Interior Electrical

1

Instrument Cluster Mounting Bolts

M5
Torque Specification
4 ft-lbs (5 N·m)
Important Notes
Securely mount the cluster to the dashboard. Estimated, standard for instrument cluster mounts.
2

Radio/Navigation Unit Mounting Bolts

M5
Torque Specification
4 ft-lbs (5 N·m)
Important Notes
Securely mount the audio/navigation unit to the dashboard or center console. Estimated, standard for radio mounts.

Emissions Sensors

Torque specifications for Emissions_sensors

Oxygen Sensors

1

Pre-Catalyst Oxygen Sensor Mounting Bolts

M18 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the threads are clean and apply anti-seize compound to prevent seizing. Over-tightening can damage sensor threads or the exhaust bung.
2

Post-Catalyst Oxygen Sensor Mounting Bolts

M18 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the threads are clean and apply anti-seize compound to prevent seizing. Over-tightening can damage sensor threads or the exhaust bung.

Mass Air Flow Sensor

1

MAF Sensor Mounting Bolts (to Airbox)

M4 x 0.7
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Estimated value based on typical small plastic housing fasteners. Over-tightening can damage the sensor's plastic housing or strip threads.
2

MAF Sensor Mounting Bolts (to MAF Housing)

M4 x 0.7
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Estimated value based on typical small plastic housing fasteners. Over-tightening can damage the sensor's plastic housing or strip threads.

Secondary Air Injection

1

SAI Pump Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the pump is securely mounted and does not vibrate excessively.
2

SAI Valve Mounting Bolts

M6 x 1.0
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Ensure a good seal to prevent air leaks in the SAI system.

Evaporative Emissions

1

EVAP Purge Valve Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure a secure mount and prevent leaks.
2

EVAP Canister Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the canister is securely mounted to the vehicle's chassis. Over-tightening can damage or strip the threads.

Exhaust System

1

Exhaust Manifold to Cylinder Head Bolts

M8 x 1.25
Torque Specification
1. 22 ft-lbs (30 N·m) 2. 90°
Important Notes
These are stretch bolts and MUST be replaced when removed. A specific tightening sequence must be followed, refer to service manual. The final tightening requires a 90-degree angle turn.
2

Exhaust Pipe Flange Bolts (to Downpipes/Catalytic Converters)

M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Use new gaskets. Proper torque prevents exhaust leaks.
3

Catalytic Converter Mounting Bolts

M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Use new gaskets. Proper torque prevents exhaust leaks.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold

1

Exhaust Manifold to Cylinder Head Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
These bolts are crucial for maintaining the seal at the cylinder head and preventing exhaust leaks. Use a new gasket and a calibrated torque wrench. Ensure mating surfaces are clean.
2

Exhaust Manifold to Downpipe Nuts/Bolts

M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
These fasteners are critical for proper exhaust flow. Use new nuts and bolts if needed, ensure mating flanges are clean and undamaged. A leak here will be very audible.

Exhaust Piping

1

Downpipe to Mid-Pipe Flange Bolts/Nuts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Proper sealing here ensures proper functioning of the catalytic converters and prevents harmful leaks.
2

Mid-Pipe to Rear Muffler/Exhaust Section Flange Bolts/Nuts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Proper torque ensures the sections are correctly aligned and sealed.
3

Exhaust Clamps (Various Diameters)

M8 x 1.25
Torque Specification
1. 35 ft-lbs (47 N·m) 2. 40 ft-lbs (54 N·m)
Important Notes
Used at slip joints or to secure pipes together when flanges are not used. Proper torque on clamps helps to keep a secure seal. Smaller clamps get 35 ft-lbs, larger 40 ft-lbs.

Exhaust Mounting

1

Exhaust Hanger Bolts to Body (Mounting Brackets)

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
These bolts support the weight of the exhaust system and reduce vibrations. Do not over-torque, they will break.

Sensors And Shields

1

Oxygen Sensor (O2 Sensor) into Exhaust Bung

M18 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Secures the O2 sensor to the exhaust system. Overtightening can damage the sensor. Use a crowfoot wrench for installation.
2

Heat Shield Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Holds the heat shields in place. Do not over-tighten as it can damage the thin heat shield material. Estimated value.

Fuel

Torque specifications for Fuel

Fuel Rail

1

Fuel Rail Mounting Bolts

M6 x 1.0
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure proper seating of the fuel rail on the intake manifold.
2

Fuel Injector Retaining Bolts/Screws

M4 x 0.7
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value. Use care when tightening these small bolts.
3

Fuel Pressure Regulator Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Ensure proper seal of the fuel pressure regulator.

Fuel Delivery

1

Fuel Filter Mounting Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure secure mounting of the fuel filter assembly.
2

Fuel Pump Assembly Retaining Bolts (Within Fuel Tank)

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure proper seating of the fuel pump module within the fuel tank.
3

Fuel Line Connection Bolts/Banjo Fittings

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Use new sealing washers and ensure a leak-proof seal.

Fuel Tank

1

Fuel Level Sending Unit Retaining Ring/Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value. Ensure proper seal and sender positioning.
2

Fuel Tank Straps/Bolts

M10 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Ensure secure mounting of the fuel tank to the undercarriage.
3

Fuel Tank Shield Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the shield is securely mounted and protecting the fuel tank.

Intake System

1

Intake Manifold to Cylinder Head Bolts

M8 x 1.25
Torque Specification
1. 18 ft-lbs (24 N·m) 2. 90°
Important Notes
Use a proper torque sequence from the center outwards. Final torque includes an angle tightening.
2

Throttle Body Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure proper sealing between the throttle body and intake manifold.

Hvac

Torque specifications for Hvac

Hvac Control Panel

1

Control Panel Mounting Bolts

M5 x 0.8
Torque Specification
5.2 ft-lbs (7 N·m)
Important Notes
Estimated value based on typical interior trim fasteners. Overtightening can damage the plastic casing.

Evaporator Core

1

Evaporator Core Housing Mounting Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Estimated based on industry standards and similar component mounting applications. Ensures proper sealing against the firewall.

Heater Core

1

Heater Core Housing Mounting Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Estimated based on similar component mounting and industry standards. Maintains seal for proper heating performance.

Blower Motor

1

Blower Motor Mounting Bolts

M5 x 0.8
Torque Specification
5.2 ft-lbs (7 N·m)
Important Notes
Estimated based on similar blower motor mounting hardware and industry standards. Ensures proper airflow and prevents vibration.

Actuators

1

Actuator Mounting Screws

M4 x 0.7 (self-tapping)
Torque Specification
1.8 ft-lbs (2.5 N·m)
Important Notes
Estimated based on industry standard for small servo motor mounting in automotive plastics. Overtightening can damage the actuator housing.

Expansion Valve

1

Expansion Valve Mounting Bolt (Compressor Side)

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated based on similar automotive refrigerant line connections. Use new o-rings, and correct fitting size.
2

Expansion Valve Mounting Bolt (Evaporator Side)

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated based on similar automotive refrigerant line connections. Critical for refrigerant sealing. Use new o-rings and correct fitting size.

Compressor

1

Compressor Mounting Bolts

M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated based on similar compressor mounting specs for Audi vehicles. Essential for proper operation and preventing vibration.

Ac Lines

1

A/C Line Mounting Bolts/Nuts (Aluminum Lines)

M8 x 1.25
Torque Specification
16.5 ft-lbs (22 N·m)
Important Notes
Estimated based on similar A/C line fittings in Audi vehicles. Use new o-rings, correct fitting size. Overtightening can damage the sealing surfaces. Aluminum fittings always less torque than steel.
2

A/C Line Mounting Bolts/Nuts (Steel Lines)

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated based on similar A/C line fittings in Audi vehicles. Use new o-rings, correct fitting size. Overtightening can damage the sealing surfaces.

Condenser

1

Condenser Mounting Bolts

M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated based on industry standard and similar component mounting applications. Prevents vibration and ensures proper alignment.

Receiver Drier

1

Receiver Drier Mounting Bolt(s)

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Estimated based on industry standards. Prevents movement and vibration.

Pressure Switch

1

Pressure Switch Mounting

M6 x 1.0
Torque Specification
6.6 ft-lbs (9 N·m)
Important Notes
Estimated based on industry standard, may vary by part, check torque spec on part. Overtightening will not increase seal. Do not overtighten.

Suspension

Torque specifications for Suspension

Front Suspension Upper Control Arms

1

Upper Control Arm Bolt (Chassis Side)

M12 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Estimated value based on similar models and bolt size. High stress point, ensure proper torque is achieved.
2

Upper Control Arm Bolt (Knuckle/Upright Side)

M10 x 1.5
Torque Specification
41 ft-lbs (55 N·m)
Important Notes
Estimated value based on similar models and bolt size. Critical for wheel stability and steering response.

Front Suspension Lower Control Arms

1

Lower Control Arm Bolt (Chassis Side)

M14 x 1.5
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
Estimated value based on similar models and bolt size. This is a high stress point, ensure proper torque is achieved.
2

Lower Control Arm Bolt (Knuckle/Upright Side)

M10 x 1.5
Torque Specification
41 ft-lbs (55 N·m)
Important Notes
Estimated value based on similar models and bolt size. This bolt is crucial for wheel stability and proper suspension movement.

Front Sway Bar

1

Sway Bar End Link Bolt (Upper)

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on similar models and industry standards. Important for maintaining sway bar effectiveness.
2

Sway Bar End Link Bolt (Lower)

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on similar models and industry standards. Ensures proper sway bar function.
3

Sway Bar Bushing Bracket Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on similar models and industry standards. Proper tightening prevents bar movement.

Front Strut Assembly

1

Strut Top Mount Bolts (Chassis Side)

M8 x 1.25
Torque Specification
1. 30 ft-lbs (40 N·m) 2. 90°
Important Notes
Critical torque and angle turn for safe attachment. Use a calibrated torque wrench and an angle gauge.
2

Strut to Knuckle/Upright Bolts

M14 x 1.5
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
Estimated value based on similar models and bolt size. Critical for maintaining suspension integrity.

Front Subframe

1

Subframe Bolts (Main Chassis)

M14 x 2.0
Torque Specification
1. 89 ft-lbs (120 N·m) 2. 90°
Important Notes
Safety-critical. Use a calibrated torque wrench and an angle gauge. Tighten bolts in a star pattern.

Steering

1

Tie Rod End Lock Nut

M14 x 1.5
Torque Specification
41 ft-lbs (55 N·m)
Important Notes
Estimated value based on similar models and industry standards. Ensure proper torque for steering stability and alignment.

Rear Suspension Upper Control Arms

1

Upper Control Arm Bolt (Chassis Side)

M12 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Estimated value based on similar models and bolt size. This is a high stress point, ensure proper torque is achieved.
2

Upper Control Arm Bolt (Knuckle/Upright Side)

M10 x 1.5
Torque Specification
41 ft-lbs (55 N·m)
Important Notes
Estimated value based on similar models and bolt size. Critical for stability and steering.

Rear Suspension Lower Control Arms

1

Lower Control Arm Bolt (Chassis Side)

M14 x 1.5
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
Estimated value based on similar models and bolt size. High stress point, ensure proper torque is achieved.
2

Lower Control Arm Bolt (Knuckle/Upright Side)

M10 x 1.5
Torque Specification
41 ft-lbs (55 N·m)
Important Notes
Estimated value based on similar models and bolt size. Essential for safety and performance.

Rear Toe Links

1

Toe Link Bolt (Chassis Side)

M12 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Estimated value based on similar models and bolt size. This is a high stress point, ensure proper torque is achieved.
2

Toe Link Bolt (Knuckle/Upright Side)

M10 x 1.5
Torque Specification
41 ft-lbs (55 N·m)
Important Notes
Estimated value based on similar models and bolt size. Critical for wheel alignment and stability.

Rear Sway Bar

1

Rear Sway Bar End Link Bolt (Upper/Lower)

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on similar models and industry standards. Ensures correct sway bar function.
2

Rear Sway Bar Bushing Bracket Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on similar models and industry standards. Correct torque maintains sway bar effectiveness.

Rear Shock Absorbers

1

Shock Absorber Lower Bolt

M14 x 1.5
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
Estimated value based on similar models and bolt size. Proper tightening is needed for safe operation.
2

Shock Absorber Upper Mount Bolts (Chassis Side)

M8 x 1.25
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Estimated value based on similar models and bolt size. Essential for safe operation of the shock.

Rear Subframe

1

Rear Subframe Bolts (Main Chassis)

M14 x 2.0
Torque Specification
1. 89 ft-lbs (120 N·m) 2. 90°
Important Notes
Safety-critical. Use a calibrated torque wrench and an angle gauge. Tighten bolts in a star pattern.

Troubleshooting Guide

Common issues, diagnostic steps, and prevention guidelines

Common Issues

Bolt stretching, stripped threads, uneven torque patterns

Loose Components

Symptoms:
  • Rattling or vibration noises
  • Visible movement in components
  • Uneven panel gaps
Solutions:
  • Clean threads and mounting surfaces
  • Replace damaged fasteners
  • Apply proper torque in sequence
  • Use thread locker if specified

Stripped Fasteners

Symptoms:
  • Unable to achieve proper torque
  • Fastener spins freely
  • Visible thread damage
Solutions:
  • Use thread repair kit if appropriate
  • Install thread insert (HeliCoil)
  • Replace component if threaded hole is damaged
  • Upgrade to higher grade fastener if recommended

Overtightened Components

Symptoms:
  • Cracked or deformed parts
  • Broken fasteners
  • Compressed gaskets or seals
Solutions:
  • Replace damaged components
  • Use new fasteners
  • Follow proper torque sequence
  • Verify correct torque specifications

Diagnostic Steps

Visual inspection, torque verification, thread assessment

1

Visual Inspection

Inspect the affected area for any visible signs of damage or wear

  • Check for cracks or deformation
  • Look for signs of excessive wear
  • Verify proper fastener installation
2

Torque Verification

Verify the torque applied to the fasteners

  • Check the torque wrench calibration
  • Verify the torque specification
  • Compare the applied torque to the specification
3

Thread Assessment

Assess the condition of the threads

  • Check for signs of thread damage
  • Verify the thread type and size
  • Check for proper thread engagement

Prevention Guidelines

Best practices, maintenance tips, tool care

Best Practices

  • Always follow the recommended torque specification
  • Use the correct type and size of fasteners
  • Verify the torque wrench calibration regularly

Maintenance Tips

  • Regularly inspect the affected area for signs of wear or damage
  • Replace damaged or worn-out components promptly
  • Keep the work area clean and organized

Tool Care

  • Regularly clean and maintain the torque wrench
  • Store the torque wrench in a dry and secure location
  • Verify the torque wrench calibration before each use

Frequently Asked Questions

Find answers to common questions about torque specifications

Q1

What IS the specified torque for cylinder head bolts on a 2003-2008 Audi S4?

Tighten cylinder head bolts in three stages: 40 Nm (30 lb-ft), 60 Nm (44 lb-ft), then 90 degrees.

Q2

What IS the appropriate torque for the oil filter housing bolts?

Tighten the oil filter housing bolts to 25 Nm (18 lb-ft).

Q3

What torque specifications should be used for the suspension control arm bolts?

Tighten the front suspension control arm bolts to 120 Nm (89 lb-ft) and the rear suspension control arm bolts to 80 Nm (59 lb-ft).

Q4

What IS the correct torque setting for the spark plugs?

Tighten the spark plugs to 25 Nm (18 lb-ft).

Q5

What torque value should be applied to the lug nuts when replacing the tires?

Tighten the lug nuts to 120 Nm (89 lb-ft) using a calibrated torque wrench.

Q6

What type of torque wrench IS recommended for accurate measurements?

Use a certified torque wrench that meets or exceeds the accuracy standards set by Audi and industry regulations.

Environmental Considerations

Temperature, humidity, and seasonal effects on torque specifications

Temperature Effects

Includes: High Heat, Cold Weather, Thermal Cycling

Temperature can significantly impact torque values and fastener behavior

Cold Weather

Effects:
  • Increased material brittleness
  • Higher torque required due to thread contraction
  • Reduced thread lubricant effectiveness
Recommendations:
  • Allow components to warm to room temperature when possible
  • Consider using winter-grade thread lubricants
  • Check torque values more frequently during winter months

Hot Weather

Effects:
  • Thermal expansion of components
  • Decreased friction in threads
  • Accelerated lubricant breakdown
Recommendations:
  • Check torque when components are at normal operating temperature
  • Use temperature-resistant thread lockers
  • Consider re-torquing after heat cycles

Humidity and Corrosion

Covers: Rust Prevention, Salt Exposure, Moisture Control

Moisture and corrosion can affect fastener integrity and torque values

High Humidity

Effects:
  • Accelerated corrosion formation
  • Reduced friction coefficient
  • Potential thread seizing
Prevention:
  • Use corrosion-resistant fasteners
  • Apply appropriate anti-seize compounds
  • Maintain proper protective coatings

Salt Exposure

Effects:
  • Rapid corrosion development
  • Thread damage
  • Seized fasteners
Prevention:
  • Regular underbody washing
  • Use of sacrificial anodes where appropriate
  • Application of protective coatings

Seasonal Maintenance

Spring, Summer, Fall, and Winter maintenance schedules

Spring

  • Inspect for winter damage
  • Clean and protect exposed fasteners
  • Check torque on critical components

Summer

  • Monitor heat-affected components
  • Check expansion-related loosening
  • Inspect cooling system mounts

Fall

  • Prepare for winter conditions
  • Apply corrosion protection
  • Verify all fasteners are properly torqued

Winter

  • More frequent inspection of critical fasteners
  • Check for salt damage
  • Monitor suspension component torque

Related Resources

Tools, service procedures, and technical bulletins

Recommended Tools

Digital Torque Wrench (10-100 Nm)

Essential for tightening fasteners to precise torque specifications, preventing damage and ensuring proper assembly. This range IS suitable for many applications on the s4.

  • Digital display for accurate readings
  • Audible alarm when target torque IS reached
  • Multiple units (Nm, ft-lb, in-lb)
  • Reversible ratcheting mechanism
Learn more
Service Procedures

Tightening Cylinder Head Bolts

Proper torque specifications are crucial for ensuring a leak-free and reliable cylinder head.

  • Clean and inspect all components.
  • Apply a thin layer of engine oil to the threads of the new bolts.
  • Tighten the bolts in the specified sequence and torque values: 20 Nm (14.8 ft-lb), then 40 Nm (29.5 ft-lb), and finally to 60 Nm (44.2 ft-lb).
  • Recheck torque after the engine has cooled down completely.
View full procedure

Installing Timing Belt

Incorrect torque on the timing belt tensioner pulley can lead to belt failure.

  • Align the timing marks on the camshafts and crankshaft.
  • Install the new timing belt according to the manufacturer's instructions.
  • Tighten the timing belt tensioner pulley to 25 Nm (18.4 ft-lb).
  • Double-check the timing alignment and re-tension the belt if necessary.
View full procedure

Replacing Brake Rotors

Proper torque IS essential for preventing brake rotor warping and ensuring safe braking.

  • Remove the wheel and caliper.
  • Clean and inspect the hub mating surface.
  • Apply a thin layer of anti-seize compound to the hub.
  • Install the new brake rotor.
  • Tighten the lug bolts to 120 Nm (89 ft-lb) in a star pattern.
View full procedure
Technical Service Bulletins

Fuel Injector Torque Specification Update

2004-06-15

Revised torque specifications for fuel injectors to address a potential fuel leak issue.

2003-2004 s4

Resolution: Replace all fuel injectors and torque to 25 Nm (18.4 ft-lb).

Intake Manifold Bolt Torque Correction

2006-02-28

Update to torque specifications for intake manifold bolts to improve sealing.

2005-2008 s4

Resolution: Retighten all intake manifold bolts to 30 Nm (22.1 ft-lb).

Legal Disclaimer

Important information about using this content

Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.

General Information
The information provided on this website is for general informational purposes only. While we strive to maintain accuracy in our content, all specifications, procedures, and technical information should be verified against your vehicle's official service manual or with the manufacturer directly.
Warranty & Liability

The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.

We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.

Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
  • Vehicle specifications and procedures may vary by model year, trim level, and region.
  • Always follow the manufacturer's recommended procedures and safety precautions.
  • Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
  • If you're unsure about any procedure, consult a qualified professional mechanic.
Intellectual Property
All content, including text, images, and specifications, is protected by copyright and other intellectual property laws. Any unauthorized use or reproduction is prohibited.

About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

Facebook Contact
15+ Years
Experience
500+ Guides
Guides
50+ Makes
Vehicles
1000+ Solutions
Solutions

Diagnostic

Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.

Repair

Expert in both traditional mechanical repairs and modern vehicle systems.

Additional Expertise

Documentation

Created over 500 detailed repair guides and technical documents.

Training

Conducted technical training sessions and contributed to repair databases.

Certifications & Research

Certifications

  • ASE Master Technician Certification
  • Advanced Diagnostic Specialist
  • Hybrid/Electric Vehicle Systems
  • Performance Tuning Expert

Research & Community

Actively researches emerging technologies and contributes to automotive forums.

© 2025 Audi Specs. All rights reserved.

Privacy Policy Terms of Service