why does my BMW X5 F15 (2014-2019) make a grinding noise when braking

Solution

1. Preparation

• Gather necessary tools and safety equipment.
• Ensure the vehicle is parked on a level surface and engage the parking brake.
• Disconnect the battery to prevent accidental deployment of the brake system.

2. Remove Wheel

• Using a socket set, loosen the lug nuts of the affected wheel.
• Raise the vehicle using a jack and secure it with jack stands.
• Remove the lug nuts completely and take off the wheel.

3. Inspect and Replace Brake Pads

• Inspection: Check brake pads for wear indicators. If they are worn down to the metal, they need replacement.
• Replacement:
  • Remove the caliper bolts with a socket wrench.
  • Carefully slide the caliper off the brake rotor (support it with a bungee cord to prevent strain on the brake line).
  • Remove the old brake pads from the caliper bracket.
  • Install new brake pads (ensure they are properly oriented and positioned).

4. Inspect and Replace Brake Rotors

• Inspection: If the rotors are scored or warped, they should be replaced.
• Replacement:
  • Remove the rotor by unscrewing any retaining screws and sliding it off the hub.
  • Clean the hub surface to ensure proper seating of the new rotor.
  • Install the new rotor, ensuring it is flush against the hub.

5. Reassemble and Test

• Reattach the caliper over the new brake pads and torque the caliper bolts to the manufacturer’s specifications (typically around 30-35 Nm).
• Reinstall the wheel and hand-tighten the lug nuts.
• Lower the vehicle and fully tighten the lug nuts in a crisscross pattern to the manufacturer’s torque specifications (usually around 120 Nm).
• Reconnect the battery.