Audi Vehicle Models Audi RS4 2018-present Torque Specifications
Audi Vehicle Models Audi RS4 2018-present

Audi Vehicle Models Audi RS4 2018-present Torque Specifications

Complete Audi Vehicle Models Audi RS4 2018-present 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

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Torque Calculator

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2.9l Engine

Torque specifications for 2.9L Engine

Engine Block And Internals

1

Crankshaft Main Bearing Cap Bolts

M10
Torque Specification
1. 22 ft-lbs (30 N·m) 2. 90°
Important Notes
Tightening sequence and angle tightening procedure are critical. Estimated based on similar engines, always use proper repair manual sequence.
2

Connecting Rod Cap Bolts

M9
Torque Specification
1. 18 ft-lbs (25 N·m) 2. 90°
Important Notes
Requires proper torque and angle sequence for proper function and preventing failure. Estimated based on similar engines, always use proper repair manual sequence.
3

Cylinder Head Bolts

M10
Torque Specification
1. 30 ft-lbs (40 N·m) 2. 90° 3. 90°
Important Notes
Multi-stage procedure and precise angles are essential. Based on similar Audi models with V6 engine.
4

Oil Pan Bolts

M6
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Industry standard for M6 bolts in aluminum.
5

Oil Pump Mounting Bolts

M6
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Industry standard for M6 bolts in aluminum.
6

Flywheel Bolts

M12
Torque Specification
1. 44 ft-lbs (60 N·m) 2. 90°
Important Notes
Always use new bolts and proper torque sequence. Based on similar Audi models.

Cylinder Head And Valvetrain

1

Camshaft Bearing Cap Bolts

M6
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Industry standard for M6 bolts in aluminum.
2

Valve Cover Bolts

M6
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Industry standard for M6 bolts in aluminum.
3

Variable Camshaft Timing Adjuster Bolts

M8
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated, verify with specific repair manual. Based on similar Audi models.
4

Spark Plugs

M14 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Industry standard for spark plugs.

Intake And Exhaust System

1

Intake Manifold Bolts

M6
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Industry standard for M6 bolts in aluminum.
2

Throttle Body Bolts

M6
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Industry standard for M6 bolts in aluminum.
3

Exhaust Manifold/Turbocharger Bolts

M10
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Estimated. Industry standard for M10 fasteners on exhaust components.
4

Exhaust Downpipe/Cat Bolts

M10
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Estimated. Industry standard for M10 fasteners on exhaust components.

Cooling System

1

Water Pump Bolts

M6
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Industry standard for M6 bolts in aluminum.
2

Thermostat Housing Bolts

M6
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Industry standard for M6 bolts in aluminum.

Turbocharging System

1

Turbocharger Oil Line Bolts (Banjo Bolts)

M10
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated based on similar components. Use new copper washers.
2

Turbocharger Coolant Line Bolts (Banjo Bolts)

M10
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated based on similar components. Use new copper washers.
3

Turbocharger Mounting Bolts

M10
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Estimated. Industry standard for M10 fasteners.

Other Critical Bolts

1

Engine Mount Bolts

M12
Torque Specification
1. 44 ft-lbs (60 N·m) 2. 90°
Important Notes
Always use new bolts where required. Based on similar Audi models.
2

Transmission to Engine Bolts

M12
Torque Specification
1. 44 ft-lbs (60 N·m) 2. 90°
Important Notes
Always use new bolts where required. Based on similar Audi models.

Body

Torque specifications for Body

Front Bumper

1

Bumper Cover Mounting Bolts (Upper)

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Secures the upper portion of the bumper cover to the core support and fenders. Estimated value based on similar Audi models.
2

Bumper Cover Mounting Bolts (Lower)

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Secures the lower portion of the bumper cover to the underbody or lower valance. Estimated value based on similar Audi models.
3

Bumper Support Bracket Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Attaches the bumper reinforcement to the chassis. Estimated value based on similar Audi applications. Use a criss-cross tightening pattern for best results.
4

Grille Mounting Screws

M4 x 0.7
Torque Specification
3.5 ft-lbs (4.7 N·m)
Important Notes
Holds the grille securely to the bumper. Estimated value based on similar Audi applications. Do not overtighten.
5

Fog Light Assembly Mounting Screws

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Secures the fog light housing to the bumper. Estimated value based on industry standard. Do not overtighten.

Fenders Quarter Panels

1

Fender Mounting Bolts (Upper)

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Secures the upper portion of the fender to the body. Estimated value based on similar Audi models.
2

Fender Mounting Bolts (Lower)

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Secures the lower part of the fender. Estimated value based on similar Audi models.
3

Inner Fender Liner Mounting Screws/Clips

M5 x 0.8
Torque Specification
2.5 ft-lbs (3.4 N·m)
Important Notes
Secures the plastic inner fender liner. Estimated value based on industry standard for plastic fasteners. Avoid over-tightening.
4

Quarter Panel Mounting Bolts (Rear)

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Secures the rear quarter panel to the car's frame. Estimated value based on similar Audi applications.

Doors

1

Door Hinge Bolts (to Body)

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Attaches door hinge to the car's frame. Estimated value based on similar Audi models. This is a critical safety fastener.
2

Door Hinge Bolts (to Door)

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Attaches the door hinge to the door itself. Estimated value based on similar Audi models. This is a critical safety fastener.
3

Door Latch Striker Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Secures the door latch striker to the body. Estimated value based on similar Audi models. This is a critical safety fastener.
4

Door Handle Fasteners

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Holds the door handle securely. Estimated value based on similar Audi applications. Avoid over-tightening.
5

Door Panel Fasteners

M5 x 0.8
Torque Specification
4.5 ft-lbs (6 N·m)
Important Notes
Secures the interior door panel to the door frame. Estimated value based on industry standard. Avoid over-tightening.
6

Window Regulator Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Secures the window regulator. Estimated value based on similar Audi applications. Proper torque is critical for smooth window operation.

Hood Trunk

1

Hood Hinge Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Secures the hood to the car. Estimated value based on similar Audi models. Important for hood alignment and operation.
2

Hood Latch Bolt (to Hood)

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Attaches the hood latch assembly to the hood. Estimated value based on similar Audi models. Ensure latch operates smoothly.
3

Hood Latch Bolt (to Chassis)

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Attaches the hood latch assembly to the body/radiator support. Estimated value based on similar Audi models. This is a critical safety fastener.
4

Trunk Lid Hinge Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Secures the trunk lid to the car. Estimated value based on similar Audi models. Important for trunk alignment and operation.
5

Trunk Latch Striker Bolt

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Secures the trunk latch striker to the body. Estimated value based on similar Audi models. Important for proper trunk closing and security.

Roof

1

Roof Trim Fasteners

M4 x 0.7
Torque Specification
3 ft-lbs (4 N·m)
Important Notes
Secures roof trim pieces. Estimated value based on industry standard. Do not overtighten, especially with self-tapping screws.
2

Sunroof Guide Rail Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Attaches guide rails for the sunroof mechanism. Estimated value based on similar Audi applications. Ensure smooth sunroof operation after tightening.

Other Body Components

1

Rocker Panel Bolts/Screws

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Secures the rocker panel to the car body. Estimated value based on similar Audi applications.
2

Rear Spoiler Mounting Bolts

M8 x 1.25
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Secures the rear spoiler to the trunk or body. Estimated value based on similar Audi applications. Important for aerodynamic performance.
3

License Plate Bracket Screws

M4 x 0.7
Torque Specification
2 ft-lbs (3 N·m)
Important Notes
Secures the license plate bracket. Estimated value based on industry standard. Lightly torqued to prevent damage to surrounding panels.

Brakes

Torque specifications for Brakes

Front Brakes

1

Caliper Mounting Bolts (Front)

M16 x 2.0
Torque Specification
166 ft-lbs (225 N·m)
Important Notes
Secures the brake caliper to the front wheel carrier. High-strength bolt. Source: Similar Model (Audi RS5, Same Generation).
2

Caliper Guide Pin Bolts (Front)

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Secures the guide pins, allowing caliper movement. Source: Similar Audi Models (S4/S5) & Industry Standard.
3

Brake Disc Retaining Screw (Front)

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Holds the brake disc to the hub. Source: Industry Standard.
4

Brake Line Connection to Caliper (Front)

M10 x 1.0 (Banjo Bolt)
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Connects the brake line to the caliper. Always use new sealing washers. Source: Similar Audi Models (S4/S5) & Industry Standard.
5

Brake Pad Wear Sensor Mounting Screw (Front)

M4 x 0.7
Torque Specification
3.7 ft-lbs (5 N·m)
Important Notes
Secures the wear sensor to the brake pad. Source: Estimated - Industry standard for small screws in similar applications.
6

ABS Sensor Bolt (Front)

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Secures the ABS sensor to the wheel carrier. Source: Similar Audi Model (A4/A5) & Industry Standard.

Rear Brakes

1

Caliper Mounting Bolts (Rear)

M14 x 1.5
Torque Specification
111 ft-lbs (150 N·m)
Important Notes
Secures the brake caliper to the rear wheel carrier. High-strength bolt. Source: Similar Model (Audi RS5, Same Generation).
2

Caliper Guide Pin Bolts (Rear)

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Secures the guide pins, allowing caliper movement. Source: Similar Audi Model (S4/S5) & Industry Standard.
3

Brake Disc Retaining Screw (Rear)

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Holds the brake disc to the hub. Source: Industry Standard.
4

Brake Line Connection to Caliper (Rear)

M10 x 1.0 (Banjo Bolt)
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Connects the brake line to the caliper. Always use new sealing washers. Source: Similar Audi Models (S4/S5) & Industry Standard.
5

Brake Pad Wear Sensor Mounting Screw (Rear)

M4 x 0.7
Torque Specification
3.7 ft-lbs (5 N·m)
Important Notes
Secures the wear sensor to the brake pad. Source: Estimated - Industry standard for small screws in similar applications.
6

ABS Sensor Bolt (Rear)

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Secures the ABS sensor to the wheel carrier. Source: Similar Audi Model (A4/A5) & Industry Standard.

Emergency Brake

1

Emergency Brake Cable Bracket Bolt

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Secures the emergency brake cable bracket to the chassis or trailing arm. Source: Estimated - Industry standard for mounting brackets in similar applications.

Dq500 Transmission

Torque specifications for Dq500 Transmission

Transmission Housing

1

Main Case Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated based on industry standard for M8 bolts in transmission housings. Tighten in a criss-cross pattern.

Mechatronic Unit

1

Mechatronic Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten in a specific sequence, typically from the center outwards. Estimated based on similar applications.

Transmission Mounts

1

Transmission Mount Bolts (to Transmission Case)

M12 x 1.75
Torque Specification
1. 44 ft-lbs (60 N·m) 2. 90°
Important Notes
Angle tightening is required. Use new bolts. Estimated based on similar models.
2

Transmission Mount Bolts (to Subframe)

M12 x 1.75
Torque Specification
1. 44 ft-lbs (60 N·m) 2. 90°
Important Notes
Angle tightening is required. Use new bolts. Estimated based on similar models.

Fluid Plugs

1

Transmission Drain Plug

M18 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Use a new crush washer. Estimated based on similar models.
2

Transmission Fill Plug

M18 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Use a new sealing washer. Estimated based on similar models.

Flywheel

1

Flywheel/Drive Plate Bolts

M12 x 1.25
Torque Specification
1. 44 ft-lbs (60 N·m) 2. 90°
Important Notes
Angle tightening is required. Use new high-strength bolts. Estimated based on similar models and industry standards.

Input Shaft Housing

1

Input Shaft Housing Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value, industry standard for M8 bolts. Tighten in a criss-cross pattern.

Differential Housing

1

Differential Housing Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Estimated value, industry standard for M10 bolts. Tighten in a criss-cross pattern.

Internal Clutch

1

Internal Clutch Pack Bolts

N/A
Torque Specification
N/A
Important Notes
These bolts are generally not designed to be serviceable and require specific factory procedures and tools. Reassembly procedures require new bolts and specialized procedures.

Oil Pump

1

Oil Pump Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value, similar application and bolt size. Tighten in a criss-cross pattern.

Oil Cooler Lines

1

Oil Cooler Line Fittings (Transmission Side)

Varies (typically M14x1.5)
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value, industry standard for fluid fittings. Use appropriate new seals or crush washers.

Speed Sensors

1

Speed Sensor Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value, industry standard for M6 bolts in sensors.

Drivetrain

Torque specifications for Drivetrain

Transmission

1

Transmission to Engine Mounting Bolts

M12 x 1.5 (estimated)
Torque Specification
1. 40 ft-lbs (54 N·m) 2. 90°
Important Notes
Critical bolts securing the transmission to the engine block. Estimated value based on similar Audi platform vehicles. Requires torque-to-yield procedure with new bolts.
2

Transmission Mount Bolts

M10 x 1.5 (estimated)
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Secures the transmission mount to the chassis. Estimated based on similar Audi vehicles. Use thread locker.
3

Transmission Fill Plug

M24 x 1.5 (estimated)
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Proper sealing is important to prevent fluid leaks. Estimated based on standard Audi fill plugs. Always use a new sealing washer.
4

Transmission Drain Plug

M24 x 1.5 (estimated)
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Proper sealing is crucial to prevent leaks. Estimated based on standard Audi drain plugs. Always use a new crush washer.
5

Mechatronics Unit Bolts (Valve Body)

M6 x 1.0 (estimated)
Torque Specification
5.8 ft-lbs (8 N·m)
Important Notes
The mechatronics unit contains sensitive valve body components. Correct torque ensures proper internal sealing and prevents distortion. Estimated value. Requires a specific sequence for installation, which is a spiral pattern starting from the center and moving outwards.
6

Transmission Oil Pan Bolts

M6 x 1.0 (estimated)
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Secures the oil pan to the transmission housing. Requires proper torque to ensure a tight seal without warping the pan. Always use a new gasket. Estimated value based on cast aluminium pans with rubber gaskets.

Front Differential

1

Front Differential Mounting Bolts

M12 x 1.5 (estimated)
Torque Specification
1. 44 ft-lbs (60 N·m) 2. 90°
Important Notes
These bolts secure the differential to the vehicle chassis and subframe. Estimated value based on similar Audi quattro platform front differentials. Requires torque-to-yield procedure with new bolts.
2

Front Differential Fill Plug

M20 x 1.5 (estimated)
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Prevents fluid leaks, proper seal. Estimated value based on standard Audi differential fill plugs. Always use a new sealing washer.
3

Front Differential Drain Plug

M20 x 1.5 (estimated)
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Prevents leaks and maintains the differential’s seal integrity. Estimated based on standard Audi differential drain plugs. Always use a new crush washer.
4

Axle Flange Bolts to Differential (M10)

M10 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Secures the drive axles to the differential. Estimated value based on industry standard for M10 bolts in driveline components. Use thread locker.

Rear Differential

1

Rear Differential Mounting Bolts

M12 x 1.5 (estimated)
Torque Specification
1. 44 ft-lbs (60 N·m) 2. 90°
Important Notes
Secures the rear differential to the subframe. Estimated based on similar Audi quattro platform rear differentials. Requires torque-to-yield procedure with new bolts.
2

Rear Differential Fill Plug

M20 x 1.5 (estimated)
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Maintains a proper seal and prevents fluid leaks. Estimated based on standard Audi differential fill plugs. Always use a new sealing washer.
3

Rear Differential Drain Plug

M20 x 1.5 (estimated)
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Prevents leaks. Estimated based on standard Audi differential drain plugs. Always use a new crush washer.
4

Rear Differential Cover Bolts

M8 x 1.25 (estimated)
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Secures the differential cover to the differential housing. Proper torque is required for a good seal. Estimated based on industry standard. Typically uses a new gasket or sealant.
5

Axle Flange Bolts to Differential (M10)

M10 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Secures the rear drive axles to the differential. Estimated value based on industry standard for M10 bolts in driveline components. Use thread locker.

Driveshaft

1

Driveshaft Center Support Bearing Bolts

M8 x 1.25 (estimated)
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Holds the center support bearing in place. Estimated value based on standard driveshaft center support bolts. Use thread locker.
2

Driveshaft Bolts to Transmission Flange (M10)

M10 x 1.5
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Connects the driveshaft to the transmission output flange. Estimated based on industry standard. Use thread locker.
3

Driveshaft Bolts to Rear Differential Flange (M10)

M10 x 1.5
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Connects the driveshaft to the rear differential input flange. Estimated based on industry standard. Use thread locker.

Axles Halfshafts

1

Axle Nut (Front)

M24 x 1.5 (estimated)
Torque Specification
1. 148 ft-lbs (200 N·m) 2. 180°
Important Notes
A critical safety-related fastener securing the front wheel hub to the axle. Needs to be tightened with a torque angle procedure. Estimated based on industry standard. Always use a new axle nut.
2

Axle Nut (Rear)

M24 x 1.5 (estimated)
Torque Specification
1. 148 ft-lbs (200 N·m) 2. 180°
Important Notes
A critical safety-related fastener securing the rear wheel hub to the axle. Needs to be tightened with a torque angle procedure. Estimated based on industry standard. Always use a new axle nut.
3

Axle Bolts to Wheel Hub Flange (6-bolt Pattern M10)

M10 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Connects the drive axle to the wheel hub flange. Estimated based on industry standard for M10 bolts in driveline components. Use thread locker.
4

Inner CV Joint to Transmission Flange (Bolts M10)

M10 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Connects the inner CV joint to the transmission flange. Estimated based on industry standard for M10 bolts in driveline components. Use thread locker.

Electrical

Torque specifications for Electrical

Battery And Related Components

1

Battery Terminal Clamp Bolts

M6
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Secures the battery terminals, ensuring proper electrical connection. Under-tightening can lead to arcing and poor performance; over-tightening can damage the battery posts.
2

Battery Hold-Down Bracket Bolts

M8
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Secures the battery in place, preventing movement and damage. Proper torque ensures the bracket is secure, especially during cornering or impacts. Estimated based on bracket size and application.
3

Ground Strap Bolt to Chassis

M8
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Provides the essential grounding connection to the chassis. A good ground is critical for all electrical circuits to function. Loose ground straps result in faulty circuits and can damage electronics. Estimated based on size and application.
4

Battery Monitoring Control Unit Bolts

M6
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Secures the monitoring unit, which plays a vital role in the energy management of the vehicle. Over-tightening these small fasteners could crack the casing.

Alternator

1

Alternator Mounting Bolts

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Secures the alternator to the engine block, ensuring correct alignment for proper belt tension and operation. Improper torque could lead to misalignment and premature wear of the alternator or belt.
2

Alternator B+ Terminal Nut

M8
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Secures the main power connection of the alternator to the vehicles electrical system. Proper torque is essential to ensure a stable, low resistance connection to handle high current. Loose connection can overheat and cause electrical issues. Estimated based on size and application.
3

Alternator Connector Fastener

Torx T25
Torque Specification
4.5 ft-lbs (6 N·m)
Important Notes
Secures the connector housing to the alternator body, ensuring a secure electrical connection. Over-tightening can damage the plastic housing and under tightening can lead to issues and poor electrical contact. Estimated based on common electrical connector fastener specs.

Starter Motor

1

Starter Motor Mounting Bolts

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Secures the starter to the engine block to be properly aligned with the flywheel to engage properly. Improper torque can cause misalignment and starter damage.
2

Starter Motor Power Cable Nut

M8
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Provides a secure, high-current connection to the starter. Loose connections can generate excessive heat. Estimated based on size and application.
3

Solenoid Connector Nut

M6
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Secures the small signal wire to activate the starter solenoid, allowing the start cycle to engage. Estimated based on size and application.

Engine Control Unit

1

ECU Mounting Bracket Bolts

M6
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Secures the ECU and its mounting bracket to the vehicle body. Over-tightening can damage the delicate ECU casing.
2

ECU Connector Retaining Bolts/Screws

Torx T10/T20
Torque Specification
2.2 ft-lbs (3 N·m)
Important Notes
Secures the electrical connectors to the ECU. Over-tightening can easily damage these delicate plastic connectors. Estimated based on similar connector fasteners.

Lighting System

1

Headlight Housing Mounting Bolts

M6
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Secures the headlight assembly to the car's body. Proper torque ensures alignment and helps prevent vibration that can cause damage. Estimated.
2

Taillight Housing Mounting Bolts

M6
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Similar to headlight bolts, these secure the taillight assemblies and ensure proper sealing to prevent water damage. Estimated.
3

Brake Light Switch Mounting Screws

Torx T20
Torque Specification
2.2 ft-lbs (3 N·m)
Important Notes
Secures the brake light switch, a critical component for activating brake lights. This is a small and sensitive fastener. Estimated based on similar switches.

Sensor Connections

1

Speed Sensor Mounting Bolt

M6
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Secure the speed sensor and ensure proper readouts for the vehicle's control systems. Estimated based on typical sensor fastener specs.
2

MAP Sensor Mounting Screw

M5
Torque Specification
4.5 ft-lbs (6 N·m)
Important Notes
Secures the Manifold Air Pressure (MAP) sensor, which is vital for engine management. Estimated based on typical sensor fastener specs.
3

Oxygen Sensor Mounting Bolts/Studs

M8
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Secures the oxygen sensors to the exhaust system; correct torque ensures they properly read exhaust gases and don't leak. Overtightening can damage the threads on the exhaust system.

Fuse Box And Relay Panel

1

Fuse Box Mounting Bolts

M6
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Secures the fuse box in the vehicle to ensure it does not move. Over-tightening can crack the plastic housing. Estimated based on typical panel fasteners.
2

Relay Panel Mounting Screws/Bolts

M5/M6
Torque Specification
4.5 ft-lbs (6 N·m)
Important Notes
Secures the relay panel and its various relays. These are typically lightweight and delicate fasteners. Estimated based on typical panel fasteners.

General Electrical Fasteners

1

General Ground Point Bolts to Chassis

M6/M8
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
These connections provide the chassis ground to various electrical components. They should be tight to ensure a consistent ground. When using M8 bolts, use a torque of 18 ft-lbs (25 N·m)
2

Electrical Connector Retaining Screws/Bolts

M4/M5
Torque Specification
2.2 ft-lbs (3 N·m)
Important Notes
Holds electrical connector housings together. When using M5 bolts, use a torque of 4.5 ft-lbs (6 N·m)

Emissions Sensors

Torque specifications for Emissions_sensors

Exhaust Sensors

1

Pre-Catalyst Oxygen Sensor Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on similar Audi models and industry standards for M8 bolts in exhaust systems. Ensure the mounting surface is clean before installation.
2

Post-Catalyst Oxygen Sensor Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on similar Audi models and industry standards for M8 bolts in exhaust systems. Ensure the mounting surface is clean before installation.
3

Nitrogen Oxide (NOx) Sensor Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value based on industry standards for M6 bolts in sensitive exhaust applications. Avoid over-tightening.
4

Exhaust Gas Temperature (EGT) Sensor Mounting Bolt

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on similar Audi models and industry standard for M8 bolts in exhaust systems. Ensure sensor is properly seated before tightening.

Nox Control Unit

1

NOx Sensor Control Unit Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value based on industry standards for M6 bolts in electronic component mounting. Do not over-tighten, as this could damage the ECU.

Scr System

1

SCR Injector Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value based on similar Audi models and industry standards for fuel/fluid injectors. Ensure proper sealing of the injector to prevent leaks.
2

SCR Catalyst Housing Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on similar Audi models and industry standard for M8 exhaust connections. Tighten in a star pattern if multiple bolts are present.
3

DEF/AdBlue Supply Line Connection Bolts/Nuts

Varies
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value based on similar fuel/fluid line connection fittings and Audi specifications. Use a flare nut wrench when tightening to avoid damaging the fittings. Ensure that the lines are correctly positioned before tightening to prevent leaks.

Intake Sensors

1

Manifold Absolute Pressure (MAP) Sensor Mounting Bolts

M5 x 0.8
Torque Specification
4 ft-lbs (5.5 N·m)
Important Notes
Estimated value based on common automotive M5 bolts in plastic. Avoid over-tightening to prevent damage to the sensor housing or intake manifold.
2

Intake Air Temperature (IAT) Sensor Mounting Bolts

M5 x 0.8
Torque Specification
4 ft-lbs (5.5 N·m)
Important Notes
Estimated value based on common automotive M5 bolts in plastic. Ensure a snug fit without over-tightening.

Fuel System Sensor

1

Fuel Tank Pressure Sensor Mounting Bolt

M5 x 0.8
Torque Specification
4 ft-lbs (5.5 N·m)
Important Notes
Estimated value based on common automotive M5 bolts in plastic and similar sensors. Avoid over-tightening as this may damage sensor housing.

Exhaust

Torque specifications for Exhaust

Turbocharger And Downpipe

1

Downpipe to Turbocharger Flange Bolts/Studs

M10 x 1.5
Torque Specification
29.5 ft-lbs (40 N·m)
Important Notes
These fasteners are critical and should be replaced if stretched or damaged. Torque in a cross pattern.
2

Downpipe to Mid-Pipe/Exhaust Section Flange Bolts

M10 x 1.5
Torque Specification
18.4 ft-lbs (25 N·m)
Important Notes
Ensure a proper seal, torque in a cross pattern. Estimated value based on similar Audi applications.

Midpipe And Rear Exhaust

1

Mid-Pipe/Exhaust Section Flange Bolts

M10 x 1.5
Torque Specification
18.4 ft-lbs (25 N·m)
Important Notes
Ensure a proper seal, torque in a cross pattern. Estimated value based on similar Audi applications.
2

Muffler Clamps/Band Clamps

M8 x 1.25
Torque Specification
29.5 ft-lbs (40 N·m)
Important Notes
Ensure clamp is properly positioned and centered before tightening. Estimated based on M8 clamp bolt.
3

Flange bolts on Secondary Catalytic converter

M10 x 1.5
Torque Specification
18.4 ft-lbs (25 N·m)
Important Notes
Ensure a proper seal, torque in a cross pattern. Estimated value based on similar Audi applications.

Support And Accessories

1

Exhaust Hanger Bolts to Chassis

M8 x 1.25
Torque Specification
14.8 ft-lbs (20 N·m)
Important Notes
Estimated based on common M8 undercarriage bolts.
2

Heat Shield Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Do not over tighten, can strip threads in sheet metal.
3

Oxygen Sensor

M18 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Apply anti-seize compound to threads. Do not over tighten.
4

Exhaust Valve Actuator Mounting Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Estimated based on typical M6 actuator mounts.

Fuel

Torque specifications for Fuel

High Pressure Fuel System

1

High-Pressure Fuel Pump Mounting Bolts

M6 x 1.0
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Torque bolts in a criss-cross pattern. Ensure a secure, leak-free seal and proper pump function. Estimated value based on similar Audi models.
2

High-Pressure Fuel Rail Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Torque bolts in a criss-cross pattern. Proper torque is crucial to prevent leaks and maintain uniform fuel distribution. Estimated value based on similar Audi models.
3

Fuel Injector Retaining Bolts (Intake Manifold Mounted)

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Ensure proper seal and prevent vacuum leaks. Estimated based on industry standard for small M6 fasteners.
4

Fuel Pressure Sensor on Fuel Rail

M5 x 0.8
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Correct torque prevents leaks and damage. Estimated based on industry standard for small sensors.
5

Fuel Line Connection Fittings (Banjo Bolts)

M10 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Critical for a leak-proof seal. Estimated based on industry standard for similar banjo fittings.

Fuel Tank And Delivery

1

Fuel Filter Mounting Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure secure mounting. Estimated based on similar Audi models.
2

Fuel Tank Strap Bolts

M10 x 1.5
Torque Specification
1. 22 ft-lbs (30 N·m) 2. 90°
Important Notes
Follow the specified torque and angle tightening sequence. Estimated based on similar Audi models.
3

Fuel Tank Access Cover Bolts

M6 x 1.0
Torque Specification
4 in-lbs (5 N·m)
Important Notes
Tight fit is important to seal fuel pump access, preventing fumes. Estimated based on light cover and fasteners.
4

Low-Pressure Fuel Pump Module Bolts (in-tank)

M5 x 0.8
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Low torque to avoid damage to plastic tank or module. Estimated based on similar Audi in-tank pump mounting.
5

Fuel Level Sensor Mounting Screws/Bolts

Self Tapping Screw, Size 4-6
Torque Specification
18 in-lbs (2 N·m)
Important Notes
Very small, needs minimal torque to avoid damage. Estimated based on industry standard

Vapor And Fill System

1

Fuel Vapor Canister Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Proper torque prevents movement and potential line damage. Estimated based on common application.
2

Fuel filler neck mounting screws/bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Proper torque helps keep fumes and liquids sealed from leaking out. Estimated based on light application.

Hvac

Torque specifications for Hvac

Ac Compressor

1

A/C Compressor Mounting Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated value based on similar Audi models and industry standards. Proper torque is crucial to prevent vibration, misalignment, and damage to the compressor or mounting points.
2

A/C Compressor Clutch Bolt

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value based on industry standards for similar applications. Secures the clutch to the compressor shaft; proper torque ensures correct engagement and disengagement.

Condenser And Receiver Drier

1

Condenser Mounting Bolts/Screws

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value based on typical M6 bolt size for heat exchanger components. Proper torque prevents vibration and ensures proper cooling efficiency.
2

Receiver Drier Mounting Bracket Bolt(s)

M6 x 1.0 or M8 x 1.25
Torque Specification
1. 7 ft-lbs (10 N·m) 2. 18 ft-lbs (24 N·m)
Important Notes
Estimated value, torque range depends on the bolt size used. Secures the receiver drier to the chassis; ensure proper sealing. Use 7 ft-lbs (10 N·m) for M6 bolts and 18 ft-lbs (24 N·m) for M8 bolts.

Ac Lines And Fittings

1

A/C Line Connection Bolts/Nuts (Compressor, Condenser, Evaporator)

M6 x 1.0 - M8 x 1.25
Torque Specification
1. 10 ft-lbs (14 N·m) 2. 20 ft-lbs (27 N·m)
Important Notes
Estimated value range depends on size and fitting type; 10 ft-lbs (14 N·m) for M6 and 20 ft-lbs (27 N·m) for M8 typical. Proper torque is crucial for leak-free connections.
2

Expansion Valve Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (12 N·m)
Important Notes
Estimated value. These bolts secure the expansion valve to the evaporator and must be torqued properly to avoid leaks. Slightly increased value for better sealing.

Evaporator And Heater Core

1

A/C Evaporator Housing Bolts

M5 x 0.8 - M6 x 1.0
Torque Specification
1. 4 ft-lbs (5 N·m) 2. 7 ft-lbs (10 N·m)
Important Notes
Estimated value range; 4 ft-lbs (5 N·m) for M5 and 7 ft-lbs (10 N·m) for M6 bolts. Secures the evaporator housing; overtightening can crack plastic components. Use lower end of range when in plastic.
2

Heater Core Inlet/Outlet Pipe Clamp Bolts/Screws

M5 x 0.8 or M6 x 1.0
Torque Specification
1. 4 ft-lbs (5 N·m) 2. 7 ft-lbs (10 N·m)
Important Notes
Estimated value range; 4 ft-lbs (5 N·m) for M5 and 7 ft-lbs (10 N·m) for M6 bolts. Secures heater core pipes to the core; ensure a tight seal without damaging pipes. Use lower end of range if in plastic.

Blower Motor And Hvac Controls

1

Blower Motor Mounting Screws

M5 x 0.8, M6 x 1.0
Torque Specification
1. 4 ft-lbs (5 N·m) 2. 7 ft-lbs (10 N·m)
Important Notes
Estimated value range, 4 ft-lbs (5 N·m) for M5 and 7 ft-lbs (10 N·m) for M6 screws. Secures the blower motor; over-tightening can damage the housing. Use lower end of range if in plastic.
2

HVAC Control Module Mounting Screws

M4 x 0.7
Torque Specification
2.5 ft-lbs (3.4 N·m)
Important Notes
Estimated value. Secures the electronic control module; these small screws often go into plastic, torque carefully to avoid stripping. Slightly increased torque for secure fit.

Hvac Ducting And Filter

1

Cabin Air Filter Housing Screws/Bolts

Plastic self-tapping
Torque Specification
2 ft-lbs (2.7 N·m)
Important Notes
Hand tighten only, do not over-tighten. Secures the cabin air filter access panel; overtightening will break the plastic or strip threads. Estimated value to use as a reference for 'snug' tightening.
2

Interior Duct Work Mounting Screws

Plastic self-tapping
Torque Specification
2 ft-lbs (2.7 N·m)
Important Notes
Hand tighten only, do not over-tighten. Secures interior duct work; overtightening can crack or strip the plastic. Estimated value to use as a reference for 'snug' tightening.

Suspension

Torque specifications for Suspension

Front Suspension

1

Upper Control Arm to Chassis Bolt (Front)

M12 x 1.5
Torque Specification
1. 60 ft-lbs (80 N·m) 2. 90°
Important Notes
Torque-to-yield bolt. Replace after removal. Crucial for suspension geometry. Estimated value based on similar Audi models.
2

Upper Control Arm to Ball Joint Bolt (Front)

M10 x 1.25
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Ensures joint stability and steering precision. Estimated value based on similar Audi models.
3

Lower Control Arm to Chassis Bolt (Front)

M14 x 1.5
Torque Specification
1. 81 ft-lbs (110 N·m) 2. 90°
Important Notes
Torque-to-yield bolt. Replace after removal. Critical for suspension strength. Estimated value based on similar Audi models.
4

Lower Control Arm Ball Joint Nut (Front)

M12 x 1.5
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Secures ball joint to the wheel carrier. Estimated value based on similar Audi models.
5

Wheel Hub/Carrier to Strut Bolt (Front)

M14 x 1.5
Torque Specification
1. 81 ft-lbs (110 N·m) 2. 90°
Important Notes
Torque-to-yield bolt. Replace after removal. This bolt is under high stress. Estimated value based on similar Audi models.
6

Sway Bar End Link Nut (Front, at sway bar)

M10 x 1.25
Torque Specification
48 ft-lbs (65 N·m)
Important Notes
Connects the sway bar to the suspension. Estimated value based on similar Audi models.
7

Sway Bar End Link Nut (Front, at strut)

M10 x 1.25
Torque Specification
48 ft-lbs (65 N·m)
Important Notes
Connects the sway bar to the suspension. Estimated value based on similar Audi models.
8

Strut Mount to Chassis Bolt (Front)

M8 x 1.25
Torque Specification
1. 22 ft-lbs (30 N·m) 2. 45°
Important Notes
Torque-to-yield bolt. Replace after removal. Usually 3 bolts. Tighten in a star pattern. Estimated value based on similar Audi models.
9

Brake Caliper Mounting Bolts (Front)

M14 x 1.5
Torque Specification
148 ft-lbs (200 N·m)
Important Notes
Secures the brake caliper. Ensure proper and even torque application. Estimated value based on similar Audi models.
10

Brake Rotor Set Screw (Front)

M6 x 1
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Temporarily secures the rotor during wheel removal/installation. Industry standard.

Rear Suspension

1

Upper Control Arm to Chassis Bolt (Rear)

M12 x 1.5
Torque Specification
1. 52 ft-lbs (70 N·m) 2. 90°
Important Notes
Torque-to-yield bolt. Replace after removal. Affects camber. Estimated value based on similar Audi models.
2

Upper Control Arm to Wheel Carrier Bolt (Rear)

M10 x 1.25
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Connects the upper control arm to the wheel carrier. Estimated value based on similar Audi models.
3

Lower Control Arm to Chassis Bolt (Rear)

M14 x 1.5
Torque Specification
1. 81 ft-lbs (110 N·m) 2. 90°
Important Notes
Torque-to-yield bolt. Replace after removal. Handles cornering and acceleration forces. Estimated value based on similar Audi models.
4

Lower Control Arm to Wheel Carrier Bolt (Rear)

M12 x 1.5
Torque Specification
66 ft-lbs (90 N·m)
Important Notes
Connects the lower control arm to the wheel carrier. Estimated value based on similar Audi models.
5

Toe Control Arm to Chassis Bolt (Rear)

M12 x 1.5
Torque Specification
1. 52 ft-lbs (70 N·m) 2. 90°
Important Notes
Torque-to-yield bolt. Replace after removal. Controls toe adjustment. Estimated value based on similar Audi models.
6

Toe Control Arm to Wheel Carrier Bolt (Rear)

M10 x 1.25
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Connects toe control arm to the wheel carrier. Estimated value based on similar Audi models.
7

Trailing Arm to Chassis Bolt (Rear)

M14 x 1.5
Torque Specification
1. 81 ft-lbs (110 N·m) 2. 90°
Important Notes
Torque-to-yield bolt. Replace after removal. Controls longitudinal wheel movement. Estimated value based on similar Audi models.
8

Trailing Arm to Wheel Carrier Bolt (Rear)

M12 x 1.5
Torque Specification
66 ft-lbs (90 N·m)
Important Notes
Connects the trailing arm to the wheel carrier. Estimated value based on similar Audi models.
9

Wheel Hub/Carrier to Strut Bolt (Rear)

M14 x 1.5
Torque Specification
1. 81 ft-lbs (110 N·m) 2. 90°
Important Notes
Torque-to-yield bolt. Replace after removal. Important for rear suspension stability. Estimated value based on similar Audi models.
10

Sway Bar End Link Nut (Rear, at sway bar)

M10 x 1.25
Torque Specification
48 ft-lbs (65 N·m)
Important Notes
Connects sway bar to the suspension. Estimated value based on similar Audi models.
11

Sway Bar End Link Nut (Rear, at control arm)

M10 x 1.25
Torque Specification
48 ft-lbs (65 N·m)
Important Notes
Connects sway bar to the suspension. Estimated value based on similar Audi models.
12

Strut Mount to Chassis Bolt (Rear)

M8 x 1.25
Torque Specification
1. 22 ft-lbs (30 N·m) 2. 45°
Important Notes
Torque-to-yield bolt. Replace after removal. Usually 3 bolts. Tighten in a star pattern. Estimated value based on similar Audi models.
13

Brake Caliper Mounting Bolts (Rear)

M12 x 1.5
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
Secures the brake caliper. Estimated value based on similar Audi models.
14

Brake Rotor Set Screw (Rear)

M6 x 1
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Temporarily secures the rotor during wheel removal/installation. Industry standard.

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 are the torque specifications for wheel lug bolts on a 2020 Audi RS4?

129 lb-ft (175 Nm)

Q2

When should I retorque my lug bolts?

Always re-torque lug bolts after 50-100 miles (80-160 km) after initial installation or tire rotation. Additionally, retorque lug bolts after any suspension work or brake pad replacement.

Q3

What IS the proper technique for torquing lug bolts?

Use a calibrated torque wrench and tighten the lug bolts in a star pattern to ensure even distribution of clamping force. Always refer to Audi's specified torque values.

Q4

Can I use an impact wrench to tighten lug bolts?

No. Using an impact wrench can overtighten lug bolts, potentially damaging the wheel or brake components. Always use a calibrated torque wrench for accurate torque application.

Q5

What type of torque wrench should I use?

Use a click-type torque wrench that IS calibrated to Audi's specifications. Avoid using beam-type torque wrenches as they are less accurate.

Q6

How often should I inspect my lug bolts?

Inspect lug bolts visually for any signs of damage or corrosion. If you notice any abnormalities, have them inspected by a qualified mechanic.

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 Rs4.

  • 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

Cylinder Head Bolt Tightening Procedure

Technical procedure overview specific to Audi Rs4

  • Clean the cylinder head bolts and threads with a wire brush.
  • Apply a thin layer of engine oil to the threads of the cylinder head bolts.
  • Tighten the cylinder head bolts in sequence to 10 Nm (7.4 ft-lb).
  • Tighten the cylinder head bolts in sequence to 20 Nm (14.8 ft-lb).
  • Tighten the cylinder head bolts in sequence to 30 Nm (22.1 ft-lb).
  • Tighten the cylinder head bolts in sequence to 40 Nm (29.5 ft-lb).
  • Tighten the cylinder head bolts in sequence to 50 Nm (36.9 ft-lb).
  • Tighten the cylinder head bolts in sequence to 60 Nm (44.3 ft-lb).
  • Tighten the cylinder head bolts in sequence to 70 Nm (51.6 ft-lb).
  • Tighten the cylinder head bolts in sequence to 80 Nm (59 ft-lb).
  • Tighten the cylinder head bolts in sequence to 90 Nm (66.4 ft-lb).
  • Tighten the cylinder head bolts in sequence to 100 Nm (74 ft-lb).
  • Tighten the cylinder head bolts in sequence to 110 Nm (81.1 ft-lb).
  • Tighten the cylinder head bolts in sequence to 120 Nm (88.5 ft-lb).
View full procedure
Technical Service Bulletins

Technical Service Bulletin: Cylinder Head Bolt Torque Specifications

2019-03-15

Detailed bulletin description for Audi Rs4

2018-Present Rs4

Resolution: The cylinder head bolts must be tightened to the following torque specifications: - 10 Nm (7.4 ft-lb) - 20 Nm (14.8 ft-lb) - 30 Nm (22.1 ft-lb) - 40 Nm (29.5 ft-lb) - 50 Nm (36.9 ft-lb) - 60 Nm (44.3 ft-lb) - 70 Nm (51.6 ft-lb) - 80 Nm (59 ft-lb) - 90 Nm (66.4 ft-lb) - 100 Nm (74 ft-lb) - 110 Nm (81.1 ft-lb) - 120 Nm (88.5 ft-lb)

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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.
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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.

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