Audi Audi S5 2007-2016 Brake System Bolt Torque Specifications
Detailed torque specifications for brake components on the 2007-2016 Audi S5 (B8 platform), including caliper bolts, rotor bolts, and bracket bolts.
Important Information
Safety guidelines and reference information for proper torque application
Safety First
- Always verify torque specifications with your vehicle's factory service manual
- Use properly calibrated torque wrenches
- Replace all torque-to-yield (TTY) bolts - they are single-use only
- When in doubt, consult a professional mechanic
Quick Reference Guide
Quick Reference Guide
Common Torque Patterns
Star Pattern
Used for wheels and other circular bolt patterns
Cross Pattern
Used for gaskets and cover plates
Sequential Pattern
Used for head bolts and other critical components
Common Mistakes to Avoid
Common Mistakes to Avoid
Over-tightening
Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.
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.
Follow the manufacturer's specified torque sequence pattern.
Dirty Threads
Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.
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.
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.
Check if specs are for dry or lubricated threads. Use specified lubricant when required.
Recommended Tools
Recommended Tools
Torque Wrench (1/4" Drive)
Torque Wrench (3/8" Drive)
Torque Wrench (1/2" Drive)
Angle Gauge
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 the front brake components, including calipers, carriers, hoses, rotors, and related hardware.
1 Caliper Mounting Bolts (Front)
M14 x 1.5
Caliper Mounting Bolts (Front)
M14 x 1.5Torque Value
Important Notes
2 Caliper Carrier Bolts (Front)
M14 x 1.5
Caliper Carrier Bolts (Front)
M14 x 1.5Important Notes
3 Brake Hose Banjo Bolt (Front)
M10 x 1.0
Brake Hose Banjo Bolt (Front)
M10 x 1.0Torque Value
Important Notes
4 Brake Disc Retaining Bolt (Front)
M6 x 1.0
Brake Disc Retaining Bolt (Front)
M6 x 1.0Torque Value
Important Notes
5 Brake Pad Retaining Pins/Bolts (Front)
M5 x 0.8
Brake Pad Retaining Pins/Bolts (Front)
M5 x 0.8Torque Value
Important Notes
6 Brake Pad Sensor Screw(s)
M4 x 0.7
Brake Pad Sensor Screw(s)
M4 x 0.7Torque Value
Important Notes
Rear Brakes
Torque specifications for the rear brake components, including calipers, carriers, hoses, rotors, and related hardware.
1 Caliper Mounting Bolts (Rear)
M12 x 1.5
Caliper Mounting Bolts (Rear)
M12 x 1.5Torque Value
Important Notes
2 Caliper Carrier Bolts (Rear)
M12 x 1.5
Caliper Carrier Bolts (Rear)
M12 x 1.5Important Notes
3 Brake Hose Banjo Bolt (Rear)
M10 x 1.0
Brake Hose Banjo Bolt (Rear)
M10 x 1.0Torque Value
Important Notes
4 Brake Disc Retaining Bolt (Rear)
M6 x 1.0
Brake Disc Retaining Bolt (Rear)
M6 x 1.0Torque Value
Important Notes
5 Parking Brake Cable Bracket Bolt (Rear)
M8 x 1.25
Parking Brake Cable Bracket Bolt (Rear)
M8 x 1.25Torque Value
Important Notes
6 Brake Pad Retaining Pins/Bolts (Rear)
M5 x 0.8
Brake Pad Retaining Pins/Bolts (Rear)
M5 x 0.8Torque Value
Important Notes
7 Brake Pad Sensor Screw(s)
M4 x 0.7
Brake Pad Sensor Screw(s)
M4 x 0.7Torque Value
Important Notes
Additional Components
Torque specifications for other brake system components, such as ABS sensors, brake line fittings and bleeder screws.
1 ABS Sensor Mounting Bolt
M6 x 1.0
ABS Sensor Mounting Bolt
M6 x 1.0Torque Value
Important Notes
2 Brake Line Fitting (to Flexible Hose)
M10 x 1.0
Brake Line Fitting (to Flexible Hose)
M10 x 1.0Torque Value
Important Notes
3 Brake Caliper Bleeder Screw
M7 x 1.0
Brake Caliper Bleeder Screw
M7 x 1.0Torque Value
Important Notes
Troubleshooting Guide
Common issues, diagnostic steps, and prevention guidelines
Common Issues
Bolt stretching, stripped threads, uneven torque patterns
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
Diagnostic Steps
Visual inspection, torque verification, thread assessment
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
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
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
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 important for brake components?
Why is using the correct torque specification important for brake components?
Using the correct torque is critical for ensuring proper brake function and safety. Over-tightening can damage threads, warp components like rotors, or cause fasteners to fail. Under-tightening can lead to components loosening over time, resulting in brake failure. For example, a loose caliper bolt could allow the caliper to shift and damage the rotor or cause uneven braking.
Q2 What happens if I over-tighten a brake caliper bolt?
What happens if I over-tighten a brake caliper bolt?
Over-tightening a brake caliper bolt can stretch or break the bolt, damage the threads in the caliper carrier, and potentially lead to premature component failure. It can also distort the caliper, which will impede the proper function of the brake pads. You might not notice immediate issues, but the weakened bolt could fail suddenly, leading to a dangerous situation.
Q3 Can I use a generic torque setting if I don't have the exact Audi S5 specification?
Can I use a generic torque setting if I don't have the exact Audi S5 specification?
No, you should never use a generic torque setting for critical components like brakes. Brake systems are engineered with very specific tolerances, and using the wrong torque could result in damage or brake failure. Always refer to the manufacturer's specifications for the Audi S5 or a reliable service manual. For example, a lug nut torqued too low may come loose, leading to wheel damage or loss, while too tight can warp the rotor.
Q4 Do I need to replace brake bolts after removing them?
Do I need to replace brake bolts after removing them?
It's generally recommended to replace certain brake bolts, especially those subjected to high torque, like the caliper carrier bolts. These bolts can stretch when torqued, and reusing them may compromise clamping force. Always consult a service manual to know which bolts should be replaced. For example, some manufacturers recommend replacing the stretch bolts on the caliper carrier each time.
Q5 Should I use threadlocker on brake bolts?
Should I use threadlocker on brake bolts?
Yes, it is often recommended to use threadlocker on certain brake bolts, especially those securing the caliper or rotor. Threadlocker helps prevent bolts from loosening due to vibration. Use a medium strength threadlocker, and make sure it is rated for the temperature operating range the brakes will experience. Always refer to a workshop manual for guidance.
Q6 How often should I inspect the torque of brake components?
How often should I inspect the torque of brake components?
It is a good practice to check the torque of critical brake components after any brake service or repair, usually after about 100 miles of driving, and then regularly with routine maintenance. If you're performing your own maintenance, consider checking them with every oil change. This is especially important after a brake job where the components might have settled and caused bolt tensions to change.
Environmental Considerations
Temperature, humidity, and seasonal effects on torque specifications
Temperature Effects
Includes: High Heat, Cold Weather, Thermal Cycling
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
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
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 accurately tightening bolts to specification, preventing damage and ensuring safety.
- Wide torque range to cover all brake components
- Audible click or digital readout for accurate tightening
Torque Wrench (3/8" Drive)
A smaller torque wrench for smaller fasteners commonly found on calipers and brackets.
- Lower torque range for smaller bolts
- Precise torque application for sensitive components
Socket Set (Metric)
A comprehensive set of metric sockets is needed to fit various bolt sizes.
- Includes common sizes for brake components
- 6-point sockets for optimal grip
Wrench Set (Metric)
A set of metric wrenches to aid in holding nuts in place while tightening
- Common metric sizes for holding nuts while torquing bolts
- Open-end and box-end wrench options
Service Procedures
Front Brake Caliper Bracket Bolt Torque
Procedure for tightening the bolts securing the front brake caliper bracket to the wheel hub assembly.
- Locate the caliper bracket bolts.
- Apply a small amount of thread locking compound to the bolt threads
- Using the correct socket and torque wrench, tighten the bolts to 190 Nm +90 deg.
- Verify torque using a calibrated torque wrench.
Rear Brake Caliper Bracket Bolt Torque
Procedure for tightening the bolts securing the rear brake caliper bracket to the wheel hub assembly.
- Locate the rear caliper bracket bolts.
- Apply a small amount of thread locking compound to the bolt threads.
- Using the correct socket and torque wrench, tighten the bolts to 120 Nm +90 deg.
- Verify torque using a calibrated torque wrench.
Front Brake Caliper Guide Pin Bolt Torque
Procedure for tightening the bolts securing the front brake caliper guide pins.
- Locate the front caliper guide pin bolts.
- Using the correct socket and torque wrench, tighten the bolts to 35 Nm.
- Verify torque using a calibrated torque wrench.
Rear Brake Caliper Guide Pin Bolt Torque
Procedure for tightening the bolts securing the rear brake caliper guide pins.
- Locate the rear caliper guide pin bolts.
- Using the correct socket and torque wrench, tighten the bolts to 30 Nm.
- Verify torque using a calibrated torque wrench.
Technical Service Bulletins
Brake Caliper Bolt Corrosion Issues
2011-05-15Some Audi S5 models may exhibit premature corrosion of brake caliper bolts due to road salt exposure.
Resolution: Replace affected caliper bolts with updated part numbers and apply anti-corrosion compound. Use specified torque values.
Rear Brake Caliper Bracket Bolt Loosening
2013-11-20Reports of rear brake caliper bracket bolts loosening on certain Audi S5 models after routine maintenance or extended use.
Resolution: Check and re-torque rear brake caliper bracket bolts to specification. Apply thread locking compound on reinstallation.
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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.