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

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the negative battery terminal to ensure safety during repairs.

2. Inspect Brake Components

• Brake Pads:
  • Remove the wheel using a lug wrench.
  • Inspect the brake pads for thickness; replace if less than 3mm.
• Brake Rotors:
  • Check rotors for scoring or warping; replace if necessary.
  • Use a micrometer to measure rotor thickness; ensure it meets specifications.
• Calipers:
  • Inspect calipers for signs of sticking or damage.
  • If the caliper is stuck, disassemble and clean or replace.

3. Replace Brake Pads and Rotors (if needed)

• Brake Pad Replacement:
  • Remove the caliper bolts using a socket set.
  • Slide the caliper off and remove old brake pads.
  • Install new brake pads, ensuring they are properly positioned.
• Rotor Replacement:
  • Remove the rotor by unscrewing the retaining screws (if applicable).
  • Install the new rotor and secure it.

4. Reassemble and Reconnect

• Reinstall the brake caliper and tighten the bolts to the manufacturer’s torque specifications (usually around 25-35 ft-lbs).
• Reinstall the wheel and tighten lug nuts in a star pattern to the manufacturer’s specifications (typically around 100-120 ft-lbs).
• Reconnect the negative battery terminal.

5. Brake Fluid and System Check

• Check brake fluid level and top off with manufacturer-recommended brake fluid (typically DOT 3 or DOT 4).
• Bleed the brake system if air is suspected to be present.