why does my BMW X3 G01 (2018-2024) make a grinding noise when braking

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is on a flat surface and secure with wheel chocks.
• Disconnect the battery to ensure safety.

2. Raise Vehicle

• Use a jack to lift the front or rear of the vehicle, depending on which brakes are making noise.
• Secure the vehicle with jack stands for safety.

3. Remove Wheel

• Use a lug wrench to loosen and remove the wheel nuts.
• Take off the wheel to access the brake components.

4. Inspect and Replace Brake Pads

• Inspect Brake Pads:
  • Remove the caliper bolts with a socket set.
  • Carefully slide the caliper off the rotor.
  • Check the brake pads for thickness; if less than 3mm, replace them.
• Replace Brake Pads:
  • Remove old brake pads from the caliper bracket.
  • Install new brake pads in the bracket.
  • Apply brake grease to the backing of the pads to reduce noise.

5. Inspect and Replace Brake Rotors (if necessary)

• Inspect Rotors:
  • Check for grooves or scoring on the rotors.
  • Measure rotor thickness; if below the minimum specification, replace.
• Replace Rotors:
  • Remove the rotor by unscrewing any retaining screws.
  • Install new rotors, ensuring they are clean and properly seated.

6. Reassemble Components

• Reinstall caliper over the new brake pads.
• Tighten caliper bolts to the manufacturer’s torque specifications (typically around 25-30 Nm).
• Reattach the wheel and tighten lug nuts in a crisscross pattern.

7. Lower Vehicle and Test

• Lower the vehicle from the jack stands and remove wheel chocks.
• Reconnect the battery.
• Pump the brake pedal to seat the new pads.
• Test drive the vehicle at low speeds to ensure noise has been resolved.