BMW M5 2018-present Brake System Bolt Torque Specifications
Detailed torque specifications for all brake-related bolts on the 2018-Present BMW M5 (F90) including caliper bolts, rotor screws, and sensor 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
Caliper Mounting
Specifications for bolts related to mounting the brake caliper assembly to the vehicle.
1 Caliper Mounting Bolts
M12 x 1.75
Caliper Mounting Bolts
M12 x 1.75Torque Value
Important Notes
2 Caliper Mounting Bracket Bolts
M14 x 1.5
Caliper Mounting Bracket Bolts
M14 x 1.5Torque Value
Important Notes
Rotor Drum Retention
Specifications for bolts used to secure brake rotors or drums to the wheel hub.
1 Rotor/Drum Retaining Bolts
M8 x 1.25
Rotor/Drum Retaining Bolts
M8 x 1.25Torque Value
Important Notes
Caliper Components
Specifications for bolts and screws related to brake caliper internal components and pad retention.
1 Brake Pad Guide Pin Bolts
M8 x 1.25
Brake Pad Guide Pin Bolts
M8 x 1.25Torque Value
Important Notes
2 Brake Pad Wear Sensor Screw/Bolt
M4 x 0.7
Brake Pad Wear Sensor Screw/Bolt
M4 x 0.7Torque Value
Important Notes
Hydraulic Connections
Specifications for bolts used in the hydraulic brake system, ensuring proper sealing and function.
1 Brake Line Banjo Bolts
M10 x 1.0
Brake Line Banjo Bolts
M10 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 torque specifications so important for brake components?
Why are torque specifications so important for brake components?
Correct torque specifications are crucial for brake safety and performance. Over-tightening can damage threads, warp components (like rotors), and lead to failure. Under-tightening can cause bolts to loosen, resulting in brake failure. Using the specified torque ensures the correct clamping force, allowing the system to function as designed and avoid uneven wear.
Q2 What happens if I overtighten a brake caliper bolt?
What happens if I overtighten a brake caliper bolt?
Overtightening a caliper bolt can stretch or break the bolt, damage the caliper threads, or cause the caliper to bind or distort. It can also lead to rotor damage due to uneven pressure. This can result in brake squeal, reduced braking performance, and potentially complete brake failure if the components give way.
Q3 Can I use a torque wrench on all brake components?
Can I use a torque wrench on all brake components?
While a torque wrench is essential for critical components like caliper mounting bolts, it may not be necessary or possible for all areas. For example, bleeder screws are typically tightened by feel, and rotor set screws are often low-torque and may not require a specific torque wrench. Always consult the service manual for the specific component you are working on.
Q4 How often should I check the torque on my brake components?
How often should I check the torque on my brake components?
It is good practice to check the torque on brake components after any major brake work, such as pad or rotor replacement. It’s also recommended to periodically check the torque as part of regular maintenance, specifically every 6 to 12 months, or as per BMW's service intervals. More frequent checks may be needed if you frequently track your vehicle.
Q5 What kind of torque wrench should I use for brake work?
What kind of torque wrench should I use for brake work?
A good quality click-type torque wrench, calibrated in Newton-meters (Nm), is essential for brake work. It should have a range that covers the required specifications for the various brake components. A range of 10-100 Nm should be adequate for most BMW M5 brake components. A digital torque wrench is a good upgrade, but a properly calibrated click type is also fine.
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 high-quality torque wrench with a range suitable for BMW brake components.
- Accurate torque settings
- Audible click to indicate target torque reached
Torque Wrench (3/8" Drive)
A smaller torque wrench for components requiring lower torque settings.
- Precise torque application
- Compact size for tight spaces
Socket Set (Metric)
A comprehensive set of metric sockets in various sizes commonly used for BMW brakes.
- Durable construction
- Wide range of sizes
- Typically includes extensions and swivel joints
Brake Caliper Hanger
A hook or hanger to safely support the brake caliper when detached from the rotor.
- Prevents strain on brake lines
- Easy attachment and removal
Service Procedures
Front Brake Caliper Removal and Installation
Procedure for removing and installing the front brake calipers on a 2018-Present BMW M5, including torque specifications.
- Loosen wheel lug nuts.
- Raise and support the vehicle safely.
- Remove the wheel.
- Disconnect the brake pad wear sensor, if equipped.
- Remove the caliper retaining bolts.
- Detach the caliper from the rotor, using a caliper hanger.
- Clean the mounting surfaces of the caliper bracket and hub.
- Install the caliper onto the bracket using the caliper bolts and apply the correct torque.
- Reconnect the brake pad wear sensor, if equipped.
- Reinstall the wheel.
- Lower the vehicle.
- Torque lug nuts to spec.
Rear Brake Caliper Removal and Installation
Procedure for removing and installing the rear brake calipers on a 2018-Present BMW M5, including torque specifications.
- Loosen wheel lug nuts.
- Raise and support the vehicle safely.
- Remove the wheel.
- Disconnect the brake pad wear sensor, if equipped.
- Remove the caliper retaining bolts.
- Detach the caliper from the rotor, using a caliper hanger.
- Clean the mounting surfaces of the caliper bracket and hub.
- Install the caliper onto the bracket using the caliper bolts and apply the correct torque.
- Reconnect the brake pad wear sensor, if equipped.
- Reinstall the wheel.
- Lower the vehicle.
- Torque lug nuts to spec.
Brake Rotor Removal and Installation
Procedure for removing and installing brake rotors on a 2018-Present BMW M5, including torque specifications for the rotor retaining screw (if equipped).
- Remove brake calipers as described above.
- Remove any rotor retaining screws (if present).
- Carefully remove the old rotor from the hub.
- Clean the hub surface.
- Install the new rotor.
- Install any rotor retaining screws (if present) and torque to spec.
- Reinstall the calipers as described above.
Brake Caliper Bracket Removal and Installation
Procedure for removing and installing the brake caliper bracket on a 2018-Present BMW M5, including torque specifications for the bracket bolts.
- Remove the brake calipers and rotors as described above.
- Remove the caliper bracket retaining bolts.
- Detach the bracket from the hub.
- Clean the mounting surface of the hub.
- Install the bracket using the bracket bolts and apply the correct torque.
- Reinstall the rotors and calipers as described above.
Technical Service Bulletins
Brake Noise at Low Speed
2020-05-15Some 2018-2020 M5 vehicles may exhibit brake noise at low speeds, particularly during light braking. This is typically due to slight vibration of the brake pads.
Resolution: Inspect brake components for wear and proper installation. Apply a thin layer of anti-squeal compound to the back of the brake pads if necessary. Ensure brake calipers are properly torqued.
Brake Caliper Bolt Re-Torque
2022-11-01Some 2021-Present M5 vehicles may experience a slight loosening of brake caliper bolts over time. This may cause vibration and irregular brake performance. All bolts should be checked to ensure they are within the specified range.
Resolution: Inspect and re-torque brake caliper bolts to specified torque values. Inspect all brake hardware for wear. Use threadlocker if deemed necessary by a qualified technician.
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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.