why does my Tesla Model 3 Highland (2024-present) make a grinding noise when braking?

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a flat surface and engaged in "Park."
• Disconnect the negative battery terminal to prevent electrical issues.

2. Brake Pad Inspection

• Tools Required: Jack and jack stands, lug wrench, socket set.
• Sub-steps:
  1. Loosen the lug nuts on the wheels.
  2. Lift the vehicle using a jack and secure it with jack stands.
  3. Remove the wheel to access the brake assembly.
  4. Visually inspect the brake pads for thickness; they should be at least 1/4 inch thick.
  5. If pads are worn down, proceed to replace them.

3. Brake Rotor Inspection

• Tools Required: Brake rotor gauge (if measuring thickness), socket set.
• Sub-steps:
  1. Check the surface of the brake rotors for any grooves or scoring.
  2. Measure rotor thickness; if below manufacturer's specifications, replace the rotor.
  3. If rotors are damaged, remove them by unscrewing the caliper and rotor mounting bolts.

4. Brake Caliper Inspection

• Tools Required: Wrench set, caliper tool (if necessary).
• Sub-steps:
  1. Check if the calipers are moving freely; apply the brakes and observe for any sticking.
  2. Clean the caliper slide pins and lubricate them with brake grease if necessary.
  3. If calipers are damaged or not functioning properly, replace them.

5. Reassembly and Testing

• Tools Required: Torque wrench, lug wrench.
• Sub-steps:
  1. Reinstall the rotors and calipers, ensuring they are secured to the manufacturer's torque specifications.
  2. Reattach the wheel and tighten the lug nuts in a star pattern.
  3. Reconnect the negative battery terminal.
  4. Lower the vehicle and perform a test drive to ensure proper brake functionality.