Audi Audi S6 2012-2018 Brake System Bolt Torque Specifications & Fastener Values
Audi Audi S6 2012-2018

Audi Audi S6 2012-2018 Brake System Bolt Torque Specifications

This page provides detailed torque specifications for all brake-related bolts on the 2012-2018 Audi S6 (C7) model, including caliper bolts, rotor screws, and other associated hardware.

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 Brakes

Specifications for the front brake calipers, rotors, and related components.

1

Front Brake Caliper Mounting Bolts

M14 x 1.5
Torque Value
120 ft-lbs (163 N·m)
Important Notes
Secures the caliper to the caliper carrier. High-stress bolts. Improper torque can lead to caliper movement, premature wear, reduced braking effectiveness, and system failure.
2

Front Brake Caliper Carrier Mounting Bolts

M14 x 1.5
Torque Value
148 ft-lbs (200 N·m)
Important Notes
Secures the caliper carrier to the wheel bearing housing. Subject to high braking forces. Critical for caliper alignment and safety.
3

Front Brake Rotor Set Screw

M6
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Holds the brake rotor in place during wheel installation. Not structurally critical but prevents shifting.
4

Front Brake Line to Caliper Bolt

Banjo Bolt - Size Estimated M10 x 1.0
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Connects the hydraulic brake line to the caliper. Important for preventing leaks and proper sealing. Improper torque may cause leaks and loss of braking ability. Always use new sealing washers.
5

Front Brake Pad Retaining Pin/Bolt

M8
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Holds the brake pads in the caliper. Critical for proper pad positioning. Torque specification is estimated.

Rear Brakes

Specifications for the rear brake calipers, rotors, and related components.

1

Rear Brake Caliper Mounting Bolts

M12 x 1.5
Torque Value
70 ft-lbs (95 N·m)
Important Notes
Secures the caliper to the caliper carrier. High-stress bolts. Improper torque can lead to caliper movement, premature wear, reduced braking effectiveness, and system failure.
2

Rear Brake Caliper Carrier Mounting Bolts

M12 x 1.5
Torque Value
66 ft-lbs (90 N·m)
Important Notes
Secures the caliper carrier to the rear axle carrier. Subject to high braking forces. Critical for caliper alignment and safety.
3

Rear Brake Rotor Set Screw

M6
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Holds the brake rotor in place during wheel installation. Not structurally critical but prevents shifting.
4

Rear Brake Line to Caliper Bolt

Banjo Bolt - Size Estimated M10 x 1.0
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Connects the hydraulic brake line to the caliper. Important for preventing leaks and proper sealing. Improper torque may cause leaks and loss of braking ability. Always use new sealing washers.
5

Parking Brake Cable Bracket Bolts

M6 or M8 (Estimated)
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Secures the parking brake cable bracket to the caliper or the axle/suspension component. Ensures that the parking brake mechanism operates correctly and is correctly positioned. Torque specification is estimated.

Brake System Components

Specifications for the brake master cylinder, booster, ABS components, and related parts.

1

Brake Master Cylinder Mounting Bolts

M8
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Secures the master cylinder to the brake booster. Correct torque is important for a secure fit and prevention of brake system leaks. Torque specification is estimated.
2

Brake Booster Mounting Bolts

M8
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Secures the brake booster to the firewall/body. Correct torque ensures secure mounting and proper operation. Torque specification is estimated.
3

ABS Control Module Mounting Bolts

M6
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Secures the ABS control module. Over-tightening can damage the unit. It is important that it is securely mounted. Torque specification is estimated.
4

ABS Sensor Mounting Bolts

M6
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Secures the wheel speed sensor (ABS sensor). Specific torque to prevent sensor damage. Ensures accurate wheel speed readings. Torque specification is estimated.

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 are correct torque specifications important for brake components?

Correct torque ensures proper clamping force, preventing components from loosening due to vibration or thermal expansion. Under-torquing can lead to component failure and brake malfunction, while over-torquing can damage threads, deform components, or cause fasteners to break. For example, over-torquing a caliper mounting bolt could cause the caliper to bind or fracture, severely impacting braking performance.

Q2

What happens if I over-torque a brake caliper bolt?

Over-torquing a brake caliper bolt can stretch or weaken the bolt, potentially leading to failure. It can also damage the threads in the caliper or the bracket, requiring expensive repairs. In a real-world situation, a stretched bolt might fail under the stress of heavy braking, resulting in loss of brake function and a dangerous situation. You should always replace a fastener that has been severely overtorqued.

Q3

What happens if I under-torque a brake caliper bolt?

Under-torquing a brake caliper bolt can cause the caliper to shift, leading to uneven pad wear, noise, and reduced braking performance. In a scenario like hard braking, the caliper could shift enough to cause the brake pads to not make proper contact with the rotor, dramatically decreasing stopping power. In severe cases, the caliper could fully detach.

Q4

Should I use thread locker on brake caliper bolts?

Generally, thread locker is not specified for most brake caliper bolts by Audi. However, always refer to the repair manual for your specific model year. If you choose to use thread locker, it's important to use a medium-strength (blue) thread locker and not a high-strength (red). Applying thread locker can lead to an inaccurate torque reading if not performed correctly.

Q5

Do I need to replace brake caliper bolts every time I remove them?

While it is not strictly required every time, it is HIGHLY recommended to replace caliper bolts, particularly those that attach the caliper to the bracket, any time they are removed. Caliper bolts are often torque-to-yield and are not designed to be re-used. Stretching or fatigue can lead to bolt failure and significant safety concerns. It is a small price to pay for a high level of safety.

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 inch drive)

A calibrated torque wrench is essential for accurately tightening brake components to the manufacturer's specified torque.

  • Wide torque range to accommodate various bolt sizes
  • Clearly marked scale for easy torque setting
  • Audible click when desired torque is reached
Learn more

Torque Wrench (3/8 inch drive)

A smaller torque wrench for tighter spots and lower torque specs.

  • Smaller profile for easier access
  • Ideal for smaller bolts and fasteners
  • Accurate readings for lower torque applications
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets, including sizes commonly used on Audi brake components.

  • Variety of sizes to fit most bolts
  • 6-point design for secure grip
  • Durable construction for long lasting use
Learn more

Wrench Set (Metric)

A metric wrench set to hold onto bolts while they are torqued.

  • Variety of sizes to fit most bolts
  • Durable construction
  • Both open and closed end wrenches
Learn more
Service Procedures

Front Brake Caliper Bracket Bolt Torque Procedure

Procedure for properly tightening the front brake caliper bracket bolts on a 2012-2018 Audi S6.

  • Locate the caliper bracket mounting bolts.
  • Using the appropriate socket and torque wrench, tighten the bolts to 190Nm (140 ft-lbs).
  • Double-check each bolt to ensure proper torque.
View full procedure

Front Brake Caliper Guide Pin Torque Procedure

Procedure for properly tightening the front brake caliper guide pins on a 2012-2018 Audi S6.

  • Locate the caliper guide pin bolts.
  • Using the appropriate socket and torque wrench, tighten the bolts to 35Nm (26 ft-lbs).
  • Double-check each bolt to ensure proper torque.
View full procedure

Rear Brake Caliper Bracket Bolt Torque Procedure

Procedure for properly tightening the rear brake caliper bracket bolts on a 2012-2018 Audi S6.

  • Locate the caliper bracket mounting bolts.
  • Using the appropriate socket and torque wrench, tighten the bolts to 120Nm (89 ft-lbs).
  • Double-check each bolt to ensure proper torque.
View full procedure

Rear Brake Caliper Guide Pin Torque Procedure

Procedure for properly tightening the rear brake caliper guide pins on a 2012-2018 Audi S6.

  • Locate the caliper guide pin bolts.
  • Using the appropriate socket and torque wrench, tighten the bolts to 30Nm (22 ft-lbs).
  • Double-check each bolt to ensure proper torque.
View full procedure
Technical Service Bulletins

Brake Caliper Bolt Loosening Issue

2017-03-15

Some 2012-2016 Audi S6 vehicles have experienced issues with brake caliper bolts loosening over time. This bulletin addresses the proper procedure for tightening and inspecting these bolts.

2012-2016 Audi S6

Resolution: Thoroughly clean all threads and use new bolts when replacing, ensure bolts are tightened to the specification mentioned in the service procedures.

Rear Brake Caliper Guide Pin Corrosion

2018-09-22

Some 2016-2018 Audi S6 vehicles have exhibited premature corrosion in the rear brake caliper guide pins. This can lead to increased brake drag.

2016-2018 Audi S6

Resolution: Inspect guide pins for corrosion and replace with updated part number if needed. Apply high temperature brake grease to pins before installation. Ensure pins are torqued to the spec mentioned in service procedures.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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