Brake noise solution Q5

Brake Noise Solution for Audi Q5 (2008-2017)

Possible Causes

1. Worn brake pads.
2. Glazed brake pads or rotors.
3. Debris caught between the rotor and pad.
4. Worn or damaged hardware.
5. Lack of lubrication on contact points.
6. Warped rotors.

Tools Required

• Jack and jack stands
• Wheel chocks
• Lug wrench
• Brake caliper tool or C-clamp
• Torque wrench
• Socket set and ratchet
• Brake cleaner
• Brake pad spreader
• Anti-squeal compound
• Dial indicator (for rotor runout)
• Micrometer (for rotor thickness)

Inspection Procedure

1. Secure the Vehicle:

   • Park the vehicle on a level surface.
   • Apply the parking brake.
   • Place wheel chocks behind the rear wheels.

2. Remove the Wheel:

   • Loosen the lug nuts with a lug wrench.
   • Raise the vehicle using a jack and secure it on jack stands.
   • Remove the lug nuts completely and take off the wheel.

3. Inspect Brake Pads:

   • Check the thickness of the brake pads. If they are less than 3mm, they need replacement.
   • Look for glazing (shiny surface) on the pads.

4. Inspect Brake Rotors:

   • Examine the rotors for grooves, glazing, or discoloration.
   • Use a micrometer to measure rotor thickness. Compare with the manufacturer's specifications.
   • Check for rotor warping using a dial indicator to measure lateral runout. Excessive runout requires rotor replacement or resurfacing.

5. Inspect Brake Hardware:

   • Ensure all caliper bolts and clips are secure and not missing.
   • Look for signs of corrosion or damage on the caliper and bracket.

6. Check for Debris:

   • Inspect for small stones or debris lodged between the rotor and pad.

Repair Instructions

Tools Required

• New brake pads (if necessary)
• New rotors (if necessary)
• Brake hardware kit (optional)
• Anti-squeal compound
• Copper grease (high-temperature lubricant)

Replacement Procedure

1. Replace Brake Pads:

   • If pads are worn or glazed, remove them by retracting the caliper piston using a C-clamp or brake caliper tool.
   • Install new pads with anti-squeal compound applied to the back of each pad.

2. Replace or Resurface Rotors:

   • If rotors are warped or below minimum thickness, replace them.
   • If resurfacing, ensure the rotor surface is smooth and free from defects.

3. Lubricate Contact Points:

   • Apply copper grease to the back of the brake pads and caliper contact points to prevent noise.
   • Lubricate slide pins with high-temperature grease to ensure smooth caliper movement.

4. Reassemble:

   • Reinstall the caliper and secure it with new or cleaned hardware.
   • Torque all bolts to the manufacturer’s specifications.

5. Reinstall the Wheel:

   • Reattach the wheel and tighten lug nuts in a crisscross pattern to the specified torque.

6. Test:

   • Lower the vehicle and remove jack stands.
   • Test drive the car at a slow speed to ensure the brake noise is resolved.

Final Check

• Ensure the brake pedal feels firm and responsive.
• Listen for any persistent noise during a test drive.
• Recheck all fasteners and components for secure installation.

By following these steps, you should be able to diagnose and repair the brake noise issue on an Audi Q5 (2008-2017). If the problem persists, further inspection by a professional may be necessary to check for underlying issues such as ABS problems or suspension-related noise.