Audi Audi TTS 2015-present Brake System Bolt Torque Specifications & Fastener Values
Audi Audi TTS 2015-present

Audi Audi TTS 2015-present Brake System Bolt Torque Specifications

Detailed torque specifications for all brake-related bolts on the 2015-Present Audi TTS, including caliper bolts, carrier bolts, and rotor set screws. Provides accurate tightening values for safe and proper brake system service.

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

Torque specifications for various components of the front braking system, including calipers, rotors, lines, and sensors.

1

Front Caliper Guide Bolts (to Caliper Bracket)

M10 x 1.5
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Secures the caliper to the bracket, allowing for smooth movement during brake application. Proper torque prevents binding and ensures even brake pad wear.
2

Front Caliper Mounting Bolts (to Hub/Knuckle)

M14 x 1.5
Important Notes
Secures the caliper bracket to the hub/knuckle. Angle tightening procedure is required to ensure proper clamping load and prevent bolt loosening due to heat cycling.
3

Front Brake Rotor Set Screw

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Holds the rotor to the hub during assembly. It is not a structural fastener. Over-tightening can damage the threads.
4

Front Brake Disc Shield Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Secures the brake disc shield in place. Protects the brake disc from debris. This torque is light. Over-tightening will damage the shield.
5

Front Brake Line/Banjo Bolt (to Caliper)

M10 x 1.0
Torque Value
26 ft-lbs (35 N·m)
Important Notes
Secures the brake line to the caliper, ensuring a leak-free connection. Always use new crush washers. Proper torque prevents fluid leaks and loss of braking power.
6

Front Brake Pad Retaining Pin/Bolt

M5 x 0.8
Torque Value
5 ft-lbs (7 N·m)
Important Notes
Holds brake pads to caliper and maintains pad position. Over-tightening could damage the pin. Estimated value.
7

Front Wheel Speed Sensor Bolt

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Secures the speed sensor. Proper torque prevents vibration and sensor malfunction.

Rear Brakes

Torque specifications for various components of the rear braking system, including calipers, rotors, lines, and sensors.

1

Rear Caliper Guide Bolts (to Caliper Bracket)

M10 x 1.5
Torque Value
26 ft-lbs (35 N·m)
Important Notes
Secures the caliper to the bracket, ensuring the caliper moves freely. Proper torque is essential for even brake pad wear and effective brake application.
2

Rear Caliper Mounting Bolts (to Hub/Knuckle)

M12 x 1.5
Torque Value
81 ft-lbs (110 N·m)
Important Notes
Secures the caliper bracket to the rear hub/knuckle. These are critical safety fasteners. Proper torque is essential to prevent movement of the brake and ensures proper brake operation.
3

Rear Brake Rotor Set Screw

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Holds the rotor to the hub during assembly. It is not a structural fastener. Over tightening can damage the threads.
4

Rear Brake Disc Shield Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Secures the brake disc shield in place. Protects the brake disc from debris. This torque is light. Over-tightening will damage the shield.
5

Rear Brake Line/Banjo Bolt (to Caliper)

M10 x 1.0
Torque Value
26 ft-lbs (35 N·m)
Important Notes
Secures the brake line to the caliper, ensuring a leak-free connection. Always use new crush washers. Proper torque is vital to ensure no brake fluid leaks.
6

Rear Brake Pad Retaining Pin/Bolt

M5 x 0.8
Torque Value
5 ft-lbs (7 N·m)
Important Notes
Holds brake pads to caliper and maintains pad position. Over-tightening could damage the pin. Estimated value.
7

Rear Wheel Speed Sensor Bolt

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Secures the speed sensor. Proper torque prevents vibration and sensor malfunction.
8

Rear Emergency Brake Cable Bracket Bolt

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Secures the emergency brake cable bracket, ensuring proper cable operation. Estimated value.

General Brake Components

Torque specifications for general brake system components such as the master cylinder, booster, bleeder screws, and ABS module.

1

Brake Master Cylinder Mounting Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Secure the brake master cylinder to the chassis or booster. Proper torque prevents movement and maintains proper functionality.
2

Brake Booster Mounting Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Hold the brake booster to the firewall. Proper torque is important to ensure stable mounting.
3

Brake Bleeder Screw

M7 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Used to bleed air from the brake system. Do not over-tighten.
4

ABS Module Mounting Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Secure the ABS Module. Proper torque is needed to prevent movement. Estimated value.

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 using the correct torque specification so important for brake bolts?

Using the correct torque specification is crucial for brake safety. Under-torquing bolts can lead to components loosening, causing brake failure. Over-torquing can damage threads, weaken bolts, or warp components, also leading to failure. Correct torque ensures proper clamping force and maintains the integrity of the braking system. For example, a loose caliper bolt could cause uneven braking, while an overtightened one could lead to a cracked caliper housing.

Q2

Do I need to use new bolts when working on the brakes?

It is highly recommended to use new bolts, especially for critical components like caliper brackets and brake calipers. Many of these bolts are designed for one-time use, often due to the application of thread-locking compounds. Reusing bolts can lead to compromised clamping force and potential loosening, which can cause catastrophic failure. Always consult your vehicle's service manual and ensure you are using the correct new bolt for every replacement.

Q3

How often should I inspect the brake bolts?

Brake bolt inspections should be a part of regular maintenance. At minimum, inspect them during routine tire rotations or every 6 months. Check for any signs of loosening, corrosion, or damage. If you've been driving aggressively or under demanding conditions, a more frequent check is advised. For example, after a day at the track, you'll want to inspect the hardware due to the elevated operating temperatures.

Q4

What tools do I need to properly torque brake bolts?

You will need a calibrated torque wrench, sockets of the correct size (typically metric), and the specific torque specifications from the Audi service manual for your 2015-Present TTS model. A good quality torque wrench is crucial for accurate and repeatable results. Avoid using impact wrenches for final torquing of brake hardware as they are too imprecise.

Q5

Can I use thread locker on brake bolts?

Yes, some brake bolts require the use of a thread locker. Refer to the service manual to determine if thread locker is required and the specific type to use (e.g., medium-strength such as Loctite 242). Using the incorrect threadlocker or applying it to bolts where it's not required may cause issues during disassembly or impact proper torque readings.

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 1/2" drive torque wrench is necessary for applying accurate torque to larger brake components.

  • Wide torque range
  • Accurate readings
  • Durable construction
Learn more

Torque Wrench (3/8" Drive)

A 3/8" drive torque wrench is suitable for smaller brake components and fasteners.

  • Good for lower torque applications
  • Precise measurements
  • Compact size
Learn more

Socket Set (Metric)

A comprehensive metric socket set is required to fit various brake bolts and fasteners.

  • Full range of metric sizes
  • Durable construction
  • Easy to read markings
Learn more

Brake Caliper Socket Set

A dedicated socket set, commonly with specific shapes, for removing brake calipers.

  • Specifically shaped sockets
  • Durable build
  • Prevents damage
Learn more
Service Procedures

Front Brake Caliper Bolt Torque Procedure

This procedure outlines the proper steps for torquing the front brake caliper bolts on a 2015-Present Audi TTS.

  • Locate the caliper bolts securing the front brake caliper.
  • Clean the bolt threads and mating surfaces.
  • Apply anti-seize compound if required.
  • Using the appropriate socket, tighten the bolts to the first stage torque specification.
  • Using a calibrated 1/2" drive torque wrench, set it to the final specified torque value.
  • Tighten the bolts to the final specified torque value in a cross pattern.
  • Recheck torque after a short drive.
View full procedure

Rear Brake Caliper Bolt Torque Procedure

This procedure outlines the proper steps for torquing the rear brake caliper bolts on a 2015-Present Audi TTS.

  • Locate the caliper bolts securing the rear brake caliper.
  • Clean the bolt threads and mating surfaces.
  • Apply anti-seize compound if required.
  • Using the appropriate socket, tighten the bolts to the first stage torque specification.
  • Using a calibrated torque wrench, set it to the final specified torque value.
  • Tighten the bolts to the final specified torque value in a cross pattern.
  • Recheck torque after a short drive.
View full procedure

Brake Rotor Bolt Torque Procedure

This procedure outlines the proper steps for torquing the brake rotor retaining bolt on a 2015-Present Audi TTS.

  • Locate the brake rotor retaining bolt (if applicable).
  • Clean the bolt threads and mating surfaces.
  • Apply anti-seize compound if required.
  • Using the appropriate socket, tighten the bolt to the specified torque value.
  • Using a calibrated torque wrench, set it to the specified torque.
  • Tighten the bolts to the specified torque.
  • Recheck torque after a short drive.
View full procedure
Technical Service Bulletins

Brake Caliper Bolt Loosening Issue

2017-05-15

Some 2015-2017 Audi TTS vehicles may experience front brake caliper bolt loosening over time, potentially affecting braking performance.

2015-2017 Audi TTS

Resolution: Inspect brake caliper bolts for proper torque and condition. Apply thread locker to prevent loosening. Always use a torque wrench and follow specified torque settings. It is recommended to replace the bolts if they show signs of damage.

Rear Brake Caliper Bolt Corrosion

2019-08-22

Certain 2018-2019 Audi TTS vehicles in high-corrosion environments have experienced increased corrosion of the rear brake caliper bolts.

2018-2019 Audi TTS

Resolution: Inspect rear brake caliper bolts for signs of corrosion. Clean affected bolts and apply a suitable anti-corrosion compound. Replace bolts if corrosion is severe. Always use a torque wrench and follow specified torque settings.

Brake Disc Retaining Bolt Torque Specification Clarification

2021-11-10

Clarification on the correct torque specification for the brake disc retaining bolt on 2020-Present Audi TTS models.

2020-Present Audi TTS

Resolution: Ensure that the brake disc retaining bolt is torqued to the specified value according to the official repair manual. The correct torque is important for proper disc fitment.

About the Author

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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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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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