Audi Audi S4 2009-2016 Body Panel & Frame Bolt Torque Specifications
Audi Audi S4 2009-2016

Audi Audi S4 2009-2016 Body & Frame Bolt Torque Specifications

This page provides detailed torque specifications for various body bolts on the Audi S4 B8 generation, covering model years 2009 to 2016. Includes torque values for exterior panels, structural components, and interior elements.

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 Bumper

This section covers the torque specifications for the front bumper, its components, and associated fasteners.

1

Front Bumper Cover Mounting Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Estimated based on industry standards for plastic components and similar Audi models. Ensure proper alignment of the bumper cover before tightening.
2

Bumper Reinforcement Mounting Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Secures the bumper reinforcement beam to the chassis. Ensure the reinforcement is properly positioned before tightening. Value based on similar Audi models.
3

Fog Light Mounting Screws

M5 x 0.8
Torque Value
4 ft-lbs (5 N·m)
Important Notes
Estimated based on industry standards for similar automotive lighting components. Do not overtighten, as this can damage the plastic housing.
4

Grille Mounting Screws

M5 x 0.8
Torque Value
4 ft-lbs (5 N·m)
Important Notes
Estimated based on industry standard for automotive trim parts and similar Audi vehicles. Ensure proper alignment of the grille before tightening.
5

License Plate Bracket Screws

M5 x 0.8
Torque Value
4 ft-lbs (5 N·m)
Important Notes
Estimated based on industry standard for automotive trim parts and similar Audi vehicles. Do not over tighten as this may cause damage to the plastic of the bumper

Fenders

Torque specifications for the fenders and their associated components.

1

Fender Mounting Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Based on similar Audi models. Ensure proper fender alignment before tightening to prevent panel gaps.
2

Inner Fender Liner Screws/Clips

Self-tapping, various sizes
Torque Value
3 ft-lbs (4 N·m)
Important Notes
Use hand-tight with a screwdriver to avoid overtightening. This is for plastic self-tapping fasteners.

Hood Hinges

Specifications for the hood, its hinges, latch, and support struts.

1

Hood Hinge Mounting Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Based on similar Audi models. Critical for proper hood alignment and operation. Ensure the hood is aligned correctly before tightening. Be careful not to over-tighten
2

Hood Latch Mounting Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Based on similar Audi models. Ensure proper hood latch function after tightening. Ensure the latch is aligned correctly before tightening.
3

Hood Strut Mounting Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Estimated based on similar Audi models. Ensure the strut is properly aligned before tightening. Do not over tighten.

Doors

Specifications for door components including hinges, latches, handles, and panels.

1

Door Hinge Mounting Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Based on similar Audi models. CRITICAL – do not overtighten. Observe the door alignment during tightening. Check door operation after tightening.
2

Door Latch Mounting Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Based on similar Audi models. Ensure proper door latch function after tightening. Verify the door locks and latches correctly after tightening.
3

Door Handle Mounting Bolts/Screws

M5 x 0.8
Torque Value
4 ft-lbs (5 N·m)
Important Notes
Estimated based on similar Audi models. Ensure the handle operates correctly after tightening. Do not over tighten the screws.
4

Door Panel Screws

Self-tapping, various
Torque Value
3 ft-lbs (4 N·m)
Important Notes
Hand-tight plus 1/4 turn. Avoid overtightening which can damage the plastic. Be careful not to strip the screw hole.

Rear Bumper

Torque specifications for the rear bumper and related parts.

1

Rear Bumper Cover Mounting Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Estimated based on industry standards and similar Audi models. Ensure proper alignment of the bumper cover before tightening.
2

Rear Bumper Reinforcement Mounting Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Based on similar Audi Model. Ensure the reinforcement is properly positioned before tightening.
3

Rear Tail Light Mounting Screws/Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Estimated based on industry standard and similar Audi vehicles. Ensure the tail light housing is aligned properly before tightening.
4

License Plate Light Screws/Bolts

M5 x 0.8
Torque Value
4 ft-lbs (5 N·m)
Important Notes
Estimated based on similar Audi vehicles. Ensure the light housing is properly seated before tightening.

Trunk Lid

Torque specifications for the trunk lid, its hinges, latch, and support struts.

1

Trunk/Boot Lid Hinge Mounting Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Based on similar Audi model. CRITICAL – do not overtighten. Observe the trunk alignment during tightening. Ensure proper operation of the trunk after tightening. Check the fitment before fully tightening.
2

Trunk/Boot Lid Latch Mounting Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Based on similar Audi model. Ensure the trunk latch operates correctly after tightening. Check the fitment of the latch before fully tightening.
3

Trunk/Boot Lid Strut Mounting Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Estimated based on similar Audi models. Ensure the strut is properly aligned before tightening. Check strut operation after tightening.

General Body

Specifications for general body trim and panel fasteners

1

General Trim Screws/Bolts

Various, typically M5 or M6
Torque Value
4 ft-lbs (5 N·m)
Important Notes
Industry Standard, use the appropriate torque based on bolt size. Use 4 ft-lbs (5 N·m) for M5, and 8 ft-lbs (11 N·m) for M6. Ensure the trim piece or body panel is properly seated before tightening.
2

Self-Tapping Screws in Plastic

Self-Tapping
Torque Value
3 ft-lbs (4 N·m)
Important Notes
Industry Standard. Hand-tight plus 1/4 turn. Used to secure plastic trim, panels, and liners. Avoid overtightening which can damage the plastic. Be careful not to strip the screw holes

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 is crucial for several reasons. Over-tightening can stretch or damage bolts and mounting points, leading to stripped threads, component deformation, and potential structural weakness. Under-tightening can cause components to become loose over time, resulting in rattles, vibrations, and potentially dangerous detachment. Proper torque ensures a secure, reliable, and long-lasting connection, maintaining the structural integrity of the vehicle's body.

Q2

What happens if I don't have a torque wrench?

While it's possible to hand-tighten bolts, it is highly discouraged for critical components like body panels. A torque wrench ensures consistent and accurate tightening, which is vital for proper assembly and safety. Without one, you risk under or over-tightening, potentially leading to the problems mentioned earlier. For any serious work on your Audi S4's body, invest in a torque wrench appropriate for the bolt sizes you'll encounter.

Q3

Where can I find the specific torque specs for my 2009-2016 Audi S4 body components?

The most reliable sources for torque specifications are the Audi repair manuals specific to your model year. These can often be accessed through online subscription services or purchased directly. Additionally, reputable third-party repair guides and forums dedicated to Audi vehicles can be valuable resources. However, always verify the information against the official documentation when possible. It's important to note that different body components may have different torque requirements - for example, a door hinge bolt will have a different specification than a fender mounting bolt.

Q4

Are there any common body bolt areas on the Audi S4 that require extra attention when working on?

Yes. The front fenders, bumper supports, hood hinges, and door hinges are areas that should be treated with extra attention when working on an Audi S4. These areas are subject to road vibration and are essential for proper alignment. Additionally, ensure proper anti-seize lubricant use when mating dissimilar metals like the aluminum fenders to the steel chassis to prevent corrosion.

Q5

How often should I check the torque on body bolts?

While there's no set interval, it's generally a good practice to check critical body bolts after any repairs or impact, especially after body work is completed. Additionally, if you notice unusual rattles or body panel misalignment, that could be an indication of a loose body bolt and warrants further inspection and torque confirmation. As a general rule for routine maintenance, once per year is advised to check the tightness of critical body bolts.

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 (1/2" Drive)

A calibrated torque wrench is essential for achieving accurate bolt torque.

  • Wide torque range (typically 20-200 ft-lbs)
  • Click-type mechanism for indicating torque
  • Digital readout (optional)
Learn more

Torque Wrench (3/8" Drive)

A smaller torque wrench for smaller bolts in the body panels

  • Lower torque range (typically 5-80 ft-lbs)
  • Click-type mechanism for indicating torque
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets to match the various bolt heads.

  • Variety of sizes (e.g., 8mm, 10mm, 13mm, 16mm, 18mm)
  • 6-point sockets for better grip and reduced stripping risk
  • Deep sockets for accessing recessed bolts
Learn more

Extension Bars

Used to reach bolts in hard-to-access locations.

  • Variety of lengths (3-inch, 6-inch, 10-inch)
  • Allows for better reach and access
Learn more

Universal Joint

Allows the socket to swivel and access bolts at an angle.

  • Provides flexibility when using sockets at an angle
  • Can be used with extensions
Learn more

Torque Angle Meter

Used for bolts requiring torque angle specification.

  • Displays degrees of rotation after achieving torque
  • Essential for torque-to-yield fasteners.
Learn more
Service Procedures

Front Bumper Cover Removal and Installation

Procedure for safely removing and installing the front bumper cover while observing torque specifications.

  • Disconnect fog light connectors (if applicable).
  • Remove fasteners securing the wheel well liner to bumper.
  • Remove bolts on top of the bumper under the hood.
  • Remove lower bolts under the bumper.
  • Carefully remove the bumper.
  • Install the bumper following the reverse of the removal.
  • Torque all fasteners to the specified value.
View full procedure

Rear Bumper Cover Removal and Installation

Procedure for safely removing and installing the rear bumper cover while observing torque specifications.

  • Remove taillight assembly (if required for access).
  • Remove fasteners securing the wheel well liner to bumper.
  • Remove upper bolts located in the trunk area.
  • Remove bolts on the lower section of the bumper.
  • Carefully remove the bumper.
  • Install the bumper following the reverse of the removal.
  • Torque all fasteners to the specified value.
View full procedure

Fender Removal and Installation

Procedure for safely removing and installing the front fender while observing torque specifications.

  • Remove wheel well liner fasteners.
  • Open the door and remove fasteners at the door jam.
  • Remove the fasteners along the top of the fender.
  • Remove the fasteners along the bottom of the fender.
  • Carefully remove the fender.
  • Install the fender following the reverse of the removal.
  • Torque all fasteners to the specified value.
View full procedure

Hood Removal and Installation

Procedure for removing and reinstalling the hood with proper torque specifications for hinges.

  • Mark the position of the hood hinges on the hood.
  • Support the hood with a suitable prop or have an assistant.
  • Remove the bolts securing the hood to the hinges.
  • Carefully remove the hood.
  • Align the hood with the marks made previously and re-install the bolts.
  • Torque bolts to specified value and check hood alignment.
View full procedure
Technical Service Bulletins

Corrosion Issues on Body Fasteners

2013-05-15

Some vehicles may experience corrosion on body fasteners leading to improper torque readings.

2009-2012

Resolution: Inspect fasteners for corrosion and replace where necessary. Apply anti-seize lubricant on new fasteners.

Front Bumper Cover Alignment Issues

2014-11-20

Some vehicles may exhibit front bumper cover alignment issues after minor collisions, often due to bent mounting tabs.

2010-2016

Resolution: Inspect mounting tabs for damage and replace if necessary. Ensure proper torque on fasteners and that all clips are engaged correctly.

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.

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.

© 2025 Audi Specs. All rights reserved.

Privacy Policy Terms of Service