Audi Audi Q5 2017-present Brake System Bolt Torque Specifications
This page provides detailed torque specifications for brake system bolts on the 2017-Present Audi Q5, including caliper bolts, carrier bolts, and rotor retaining screws.
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 various components of the front brake system, including the calipers, brackets, and related hardware.
1 Caliper Mounting Bracket Bolts (to Wheel Bearing Housing)
M14 x 1.5
Caliper Mounting Bracket Bolts (to Wheel Bearing Housing)
M14 x 1.5Important Notes
2 Caliper Guide Pin Bolts (Caliper to Bracket)
M10 x 1.25
Caliper Guide Pin Bolts (Caliper to Bracket)
M10 x 1.25Torque Value
Important Notes
3 Brake Disc Retaining Screw
M6 x 1.0
Brake Disc Retaining Screw
M6 x 1.0Torque Value
Important Notes
4 Brake Hose Connection at Caliper
M10 x 1.0 (Flare Nut)
Brake Hose Connection at Caliper
M10 x 1.0 (Flare Nut)Torque Value
Important Notes
5 Wheel Speed Sensor Bolt
M6 x 1.0
Wheel Speed Sensor Bolt
M6 x 1.0Torque Value
Important Notes
Rear Brakes
Torque specifications for the rear brake system components, mirroring the structure of the front brake system.
1 Caliper Mounting Bracket Bolts (to Axle Carrier)
M14 x 1.5
Caliper Mounting Bracket Bolts (to Axle Carrier)
M14 x 1.5Important Notes
2 Caliper Guide Pin Bolts (Caliper to Bracket)
M10 x 1.25
Caliper Guide Pin Bolts (Caliper to Bracket)
M10 x 1.25Torque Value
Important Notes
3 Brake Disc Retaining Screw
M6 x 1.0
Brake Disc Retaining Screw
M6 x 1.0Torque Value
Important Notes
4 Brake Hose Connection at Caliper
M10 x 1.0 (Flare Nut)
Brake Hose Connection at Caliper
M10 x 1.0 (Flare Nut)Torque Value
Important Notes
5 Electronic Parking Brake Motor Bolts
M6 x 1.0
Electronic Parking Brake Motor Bolts
M6 x 1.0Torque Value
Important Notes
6 Wheel Speed Sensor Bolt
M6 x 1.0
Wheel Speed Sensor Bolt
M6 x 1.0Torque Value
Important Notes
General Components
Torque specifications for general brake system components, such as line brackets, master cylinder, booster, and ABS module.
1 Brake Line Bracket Bolts (to body/chassis)
M8 x 1.25
Brake Line Bracket Bolts (to body/chassis)
M8 x 1.25Torque Value
Important Notes
2 Brake Master Cylinder Mounting Bolts
M8 x 1.25
Brake Master Cylinder Mounting Bolts
M8 x 1.25Torque Value
Important Notes
3 Brake Booster Mounting Bolts (to firewall)
M8 x 1.25
Brake Booster Mounting Bolts (to firewall)
M8 x 1.25Torque Value
Important Notes
4 ABS Module Mounting Bolts
M6 x 1.0
ABS Module Mounting Bolts
M6 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 are proper torque specifications so important for brake components?
Why are proper torque specifications so important for brake components?
Applying the correct torque ensures the components are securely fastened without being overtightened or undertightened. Overtightening can damage threads, deform parts, and cause premature failure. Undertightening can lead to loose components, vibrations, and potential brake failure. Both situations are extremely dangerous. For example, if a caliper bracket bolt is undertightened, the caliper could shift during braking, causing uneven pad wear and potentially losing braking power.
Q2 What happens if I don't use a torque wrench?
What happens if I don't use a torque wrench?
While it might seem convenient to tighten bolts by feel, this is not recommended for critical components like brakes. A torque wrench provides precise measurement, ensuring each fastener is tightened to the manufacturer's specification. Guessing can easily lead to over or under-tightening, as described in the previous question. For example, if the brake rotor retaining screws are tightened by feel, one may be tighter than the other, leading to rotor warping when heated by braking.
Q3 Are the torque specifications the same for all Audi Q5 models from 2017 to Present?
Are the torque specifications the same for all Audi Q5 models from 2017 to Present?
While many torque specifications are similar across the 2017-Present Audi Q5 range, it is crucial to check the specific repair manual for your exact model year and trim level. Differences can arise due to variations in brake system components or model revisions. For example, the torque for the front caliper bolts might be different for a standard Q5 versus an SQ5. Always verify using the proper documentation.
Q4 Should I use new bolts each time I work on the brakes?
Should I use new bolts each time I work on the brakes?
In most cases, it's advisable to use new bolts, especially for critical components like caliper bolts or carrier bolts. These bolts may be stretch bolts designed to deform upon tightening. Reusing them can compromise their strength and clamping force, leading to a higher risk of failure. An example is the caliper guide pin bolts; they are generally recommended to be replaced with new ones each time the caliper is removed to guarantee proper function and prevent sticking.
Q5 Can I use Loctite on brake bolts?
Can I use Loctite on brake bolts?
Loctite is generally not needed for most brake bolts if the specified torque is used; however, some manufacturers specify Loctite in some instances, such as on the rear brake caliper bracket bolts, in order to prevent bolts from backing out due to vibrations. Refer to the specific repair manual for your vehicle model, to verify. If used, the correct Loctite grade must be used to prevent issues when removal is necessary.
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 the manufacturer's specifications. A 1/2" drive is recommended for brake components.
- Wide torque range (e.g., 10-150 ft-lbs)
- Accurate torque measurement
- Durable construction
Torque Wrench (3/8" Drive)
A smaller 3/8" drive torque wrench is useful for smaller fasteners that do not require as much torque, such as caliper guide bolts.
- Suitable for lower torque applications (e.g., 5-80 ft-lbs)
- Accurate torque measurement
- Durable construction
Socket Set (Metric)
A comprehensive set of metric sockets, including common sizes for brake components (e.g., 13mm, 15mm, 16mm, 18mm, 21mm), is necessary.
- Various sizes and depths
- Durable construction
- Clear size markings
Brake Caliper Hanger
A hanger to suspend the brake caliper during brake service, preventing damage to the brake line.
- Durable construction
- Universal fit for most calipers
- Hook and support design
Service Procedures
Front Brake Caliper Removal and Installation
Procedure for removing and reinstalling the front brake caliper, including torque specifications.
- Loosen wheel lug bolts.
- Raise and support vehicle safely.
- Remove wheel.
- Disconnect the brake pad wear sensor connector (if equipped).
- Remove the caliper guide bolts.
- Remove the caliper from the rotor, using a hanger to support it.
- Install the caliper, guiding it over the rotor.
- Install and tighten the caliper guide bolts to the specified torque (35 Nm + 45 degree turn).
- Reconnect the brake pad wear sensor connector.
- Install the wheel.
- Lower the vehicle.
- Torque wheel lug bolts to spec (140 Nm).
Rear Brake Caliper Removal and Installation
Procedure for removing and reinstalling the rear brake caliper, including torque specifications.
- Loosen wheel lug bolts.
- Raise and support vehicle safely.
- Remove wheel.
- Disconnect the brake pad wear sensor connector (if equipped).
- Remove the caliper guide bolts.
- Remove the caliper from the rotor, using a hanger to support it.
- Install the caliper, guiding it over the rotor.
- Install and tighten the caliper guide bolts to the specified torque (35 Nm + 45 degree turn).
- Reconnect the brake pad wear sensor connector.
- Install the wheel.
- Lower the vehicle.
- Torque wheel lug bolts to spec (140 Nm).
Front Brake Rotor Removal and Installation
Procedure for removing and installing the front brake rotor, including torque specifications.
- Follow steps for caliper removal.
- Remove caliper bracket bolts.
- Remove brake rotor.
- Install new rotor onto hub.
- Install caliper bracket and torque bolts to spec (190 Nm + 180 degree turn).
- Follow steps for caliper installation.
Rear Brake Rotor Removal and Installation
Procedure for removing and installing the rear brake rotor, including torque specifications.
- Follow steps for caliper removal.
- Remove caliper bracket bolts.
- Remove brake rotor.
- Install new rotor onto hub.
- Install caliper bracket and torque bolts to spec (170 Nm + 180 degree turn).
- Follow steps for caliper installation.
Technical Service Bulletins
Squealing Brakes During Normal Operation
2018-05-15Some 2017-2018 Q5 models may experience squealing brake noise during normal operation. This bulletin addresses this issue.
Resolution: Inspect brake pad material, rotor condition, and caliper operation. Replace as necessary. Ensure all bolts are torqued to specification.
Rear Brake Caliper Guide Bolt Corrosion
2020-02-20A number of Q5 vehicles from 2018-2020 have reported premature corrosion of the rear brake caliper guide bolts, resulting in binding of the calipers. Check for corrosion when servicing.
Resolution: Replace the rear caliper guide bolts when performing a brake service. Clean caliper bracket before reinstallation. Ensure torque specification is followed.
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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.