Audi Audi S5 2017-present Body Panel & Frame Bolt Torque Specifications
Audi Audi S5 2017-present

Audi Audi S5 2017-present Body & Frame Bolt Torque Specifications

Comprehensive guide to body bolt torque specifications for the 2017-Present Audi S5 (B9 and B9.5 generations). Includes torque values for various body components.

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

Front Body

Torque specifications for components related to the front structure of the vehicle, including the bumper, fenders, hood, and core support.

1

Headlight Mounting Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Estimated based on similar components and bolt size. Proper torque is crucial for alignment and preventing damage to the headlight unit.
2

Front Bumper Cover Mounting Bolts (Main)

M6 x 1.0
Torque Value
6 ft-lbs (8 N·m)
Important Notes
Estimated based on similar components and bolt size. Ensures the bumper cover fits properly and does not rattle.
3

Front Bumper Cover Side Bracket Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Estimated based on similar components and bolt size. Important for panel alignment and preventing vibrations.
4

Fender Mounting Bolts to Body (Upper)

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Estimated based on similar components and bolt size. Critical for panel alignment and structural integrity.
5

Fender Mounting Bolts to Body (Lower)

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Estimated based on similar components and bolt size. Similar importance to upper bolts for panel alignment.
6

Hood Hinge Bolts to Hood

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensures smooth opening/closing and safety.
7

Hood Hinge Bolts to Body

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Crucial for hood alignment and proper function.
8

Front Core Support Mounting Bolts

M10 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Vital for frontal crash integrity.

Side Body

Torque specifications for components related to the sides of the vehicle, including doors, rocker panels, and related hardware.

1

Door Hinge Bolts to Door

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Precise torque ensures proper door alignment, smooth operation and safety. M8 or M10 depending on location, assuming M8.
2

Door Hinge Bolts to Body

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Important for correct door alignment, operation and safety. M8 or M10 depending on location, assuming M8.
3

Door Latch Striker Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Proper torque allows for secure door latching and safe operation. Alignment may require adjustment.
4

Door Handle Mounting Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Estimated based on similar components and bolt size. Ensures proper handle operation and prevents looseness.
5

Rocker Panel Mounting Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Estimated based on similar components and bolt size. Ensures proper fit and appearance.

Rear Body

Torque specifications for components related to the rear of the vehicle, including the bumper, taillights, trunk/decklid, and quarter panels.

1

Rear Bumper Cover Mounting Bolts (Main)

M6 x 1.0
Torque Value
6 ft-lbs (8 N·m)
Important Notes
Estimated based on similar components and bolt size. Ensures proper alignment and prevents rattles.
2

Rear Bumper Cover Side Bracket Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Estimated based on similar components and bolt size. Critical for correct panel alignment and preventing vibrations.
3

Taillight Mounting Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Estimated based on similar components and bolt size. Ensures proper alignment and prevents damage to the taillight unit.
4

Decklid/Trunk Hinge Bolts to Decklid/Trunk

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Critical for proper operation and alignment.
5

Decklid/Trunk Hinge Bolts to Body

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Important for alignment and smooth opening/closing.
6

Rear Quarter Panel Mounting Bolts (Inner)

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Estimated based on similar components and bolt size. Essential for panel rigidity.
7

Rear Quarter Panel Mounting Bolts (Outer)

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Estimated based on similar components and bolt size. Important for panel alignment and aesthetics.
8

Rear Decklid Latch Striker Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Essential for secure closure and proper latching. Alignment may require adjustment.

Interior Body

Torque specifications for components within the passenger cabin, including the dashboard, seats, seatbelts, center console, and steering column.

1

Dashboard Mounting Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Estimated based on similar components and bolt size. Important for safety and preventing rattles.
2

Seat Mounting Bolts

M10 x 1.5
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Critical for safety. M10 or M12 depending on location, assuming M10. Verify with the vehicle's specific service manual.
3

Seat Belt Anchor Bolts

M10 x 1.5
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Extremely critical for safety. Usually a high strength bolt. Verify with the vehicle's specific service manual.
4

Center Console Mounting Bolts

M6 x 1.0
Torque Value
6 ft-lbs (8 N·m)
Important Notes
Estimated based on similar components and bolt size. Ensures proper fit and prevents vibrations.
5

Steering Column Mounting Bolts

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Essential for driver control. M8 or M10 depending on location, assuming M8.

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

Why is it important to use the correct torque specifications for body bolts?

Using the correct torque specifications is crucial for maintaining the structural integrity of your Audi S5's body. Over-tightening can damage threads, deform panels, and cause stress points, potentially leading to cracks or premature failure. Under-tightening can result in loose components, rattles, and reduced safety in a collision. Accurate torque ensures even clamping force and proper panel alignment.

Q2

What happens if I overtighten a body bolt?

Overtightening body bolts can lead to several problems. The bolt itself could stretch or shear, compromising its ability to hold. You might also damage the threads in the receiving panel or subframe, requiring more extensive repairs. Overtightening can also crush the panel itself, leading to visible deformation or weakened areas. For example, overtightening a fender bolt could cause dimpling of the fender's surface and paint cracking.

Q3

Can I use threadlocker on body bolts?

Generally, threadlocker is not necessary for most body bolts on the Audi S5 as they're usually designed to stay in place with the specified torque. However, if you are dealing with a bolt that has a history of loosening, a low-strength threadlocker (like Loctite 242/243) can be used sparingly. Avoid using a high-strength threadlocker, which would make future removal extremely difficult. Always refer to the specific service manual for recommendations on any particular bolt.

Q4

How often should I check the torque of body bolts?

Unless you've recently disassembled and reassembled body panels, checking body bolt torque as routine maintenance is generally not needed. However, after any repair involving body work, or if you notice unusual noises or looseness in body panels, checking the relevant bolt torque is recommended. For example, if you had bodywork done after a minor collision, it's wise to double-check the bolt torques a week or two after the work is completed.

Q5

What tools do I need to accurately torque body bolts?

You will need a torque wrench that is calibrated to the range of torque specifications listed. Typically, a 1/4" or 3/8" drive torque wrench should cover most body panel bolts. Sockets and extensions of the appropriate sizes are necessary, as well as the correct type of socket, whether it is a standard, impact, torx, or triple square socket, for example. Always ensure that your torque wrench is calibrated and within calibration, and that you are familiar with using the tool before torquing any fasteners.

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

Torque Wrench (1/4" Drive)

A 1/4" drive torque wrench is essential for accurately tightening smaller body bolts to specification.

  • Precise torque measurement
  • Click-type mechanism for audible confirmation
Learn more

Torque Wrench (3/8" Drive)

A 3/8" drive torque wrench is suitable for many of the medium-sized body bolts.

  • Wider torque range than 1/4" drive
  • Durable construction for repeated use
Learn more

Socket Set (Metric)

A comprehensive metric socket set is necessary to fit the various bolt head sizes on the vehicle's body.

  • Wide range of metric sizes
  • 6-point design for secure grip
Learn more

Extension Bars (Various Lengths)

Extension bars allow access to bolts in recessed or hard-to-reach areas.

  • Increased reach
  • Durable construction
Learn more

Universal Joint

A universal joint enables working on fasteners from an angle.

  • Flexible movement
  • Durable construction
Learn more
Service Procedures

Front Bumper Cover Removal and Installation

This procedure outlines the removal and installation of the front bumper cover, including bolt torque specs.

  • Disconnect any sensors or wiring harnesses connected to the bumper cover.
  • Remove all fasteners securing the bumper cover to the fenders, frame, and underbody.
  • Carefully detach the bumper cover from the vehicle.
  • Install the bumper cover by aligning it with the vehicle body.
  • Install and tighten all fasteners to the specified torque using a torque wrench.
  • Reconnect all sensors and wiring harnesses.
View full procedure

Rear Bumper Cover Removal and Installation

This procedure outlines the removal and installation of the rear bumper cover, including bolt torque specs.

  • Disconnect any sensors or wiring harnesses connected to the bumper cover.
  • Remove all fasteners securing the bumper cover to the fenders, frame, and underbody.
  • Carefully detach the bumper cover from the vehicle.
  • Install the bumper cover by aligning it with the vehicle body.
  • Install and tighten all fasteners to the specified torque using a torque wrench.
  • Reconnect all sensors and wiring harnesses.
View full procedure

Fender Removal and Installation

This procedure outlines the removal and installation of a fender, including all relevant bolt torque specs.

  • Remove any plastic trim or liners from the fender well.
  • Remove all fasteners securing the fender to the vehicle's body.
  • Carefully detach the fender from the vehicle.
  • Install the new or replacement fender.
  • Install and tighten all fasteners to the specified torque using a torque wrench.
  • Reinstall plastic trim or liners into the fender well.
View full procedure

Headlight Assembly Removal and Installation

This procedure outlines the removal and installation of the headlight assembly, including bolt torque specs.

  • Disconnect any wiring harness connectors from the headlight assembly.
  • Remove all fasteners securing the headlight assembly to the fender and core support.
  • Carefully detach the headlight assembly from the vehicle.
  • Install the headlight assembly.
  • Install and tighten all fasteners to the specified torque using a torque wrench.
  • Reconnect all wiring harness connectors.
View full procedure

Taillight Assembly Removal and Installation

This procedure outlines the removal and installation of the taillight assembly, including bolt torque specs.

  • Open trunk or hatchback to access the interior mounting points.
  • Disconnect any wiring harness connectors from the taillight assembly.
  • Remove all fasteners securing the taillight assembly to the body.
  • Carefully detach the taillight assembly from the vehicle.
  • Install the taillight assembly.
  • Install and tighten all fasteners to the specified torque using a torque wrench.
  • Reconnect all wiring harness connectors.
View full procedure
Technical Service Bulletins

Body Panel Alignment Issues

2018-05-10

Some 2017-2018 Audi S5 models may exhibit minor body panel misalignment. This bulletin details the proper adjustment procedures and torque values for corrective action.

2017-2018

Resolution: Inspect and adjust panel mounting points and tighten bolts to specified torque. Re-evaluate panel alignment for proper fit.

Bumper Cover Fastener Corrosion

2020-11-15

Certain fasteners securing the front and rear bumper covers of 2019-2020 Audi S5 vehicles may be susceptible to corrosion. This bulletin outlines recommended replacement procedures and fastener specifications.

2019-2020

Resolution: Replace all affected fasteners with specified corrosion-resistant hardware. Ensure all bolts are tightened to the correct torque. Apply corrosion inhibitor to exposed threads.

Headlight Mounting Bolt Breakage

2022-03-22

A small number of 2021-2022 Audi S5 vehicles have reported issues of headlight mounting bolt breakage during service. This bulletin provides updated torque specifications and recommended installation practices.

2021-2022

Resolution: Inspect headlight mounting points for damage. Use a calibrated torque wrench to ensure bolts are tightened to the revised specification. Replace any damaged hardware.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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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.
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