my Tesla Model 3 Highland (2024-present) makes a grinding noise when braking, what's wrong

Tesla Model 3 Highland (2024-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

511 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix grinding noise when braking in Tesla Model 3 Highland. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Brakes

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on the braking system.
•Allow the vehicle to cool before handling brake components.

Symptoms

•Grinding noise when applying brakes
•Reduced braking efficiency
•Vibration or pulsation in the brake pedal
•Brake warning light illuminated on the dashboard
•Unusual wear patterns on brake pads or rotors

Diagnostic Steps

1
Inspect the brake pads for wear and proper installation.
2
Check the brake rotors for scoring, warping, or damage.
3
Examine brake calipers for proper operation and any signs of sticking.
4
Inspect brake fluid levels and condition.
5
Use an OBD-II scanner to check for any related error codes.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Jack and jack stands
•Lug wrench
•Socket set
•Torque wrench

Parts Required

•Brake pads
•Brake rotors (if necessary)

Related Faults

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Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the parking brake is engaged.
Disconnect the negative battery terminal to ensure safety.

2. Remove Wheel

Use a jack to lift the front or rear of the vehicle, depending on which brakes are making noise.
Secure the vehicle on jack stands.
Remove the wheel using a lug wrench.

3. Inspect and Replace Brake Pads

Inspect Brake Pads:
- Check the thickness of the brake pads.
- Look for uneven wear or damage.
Replace Brake Pads:
- Remove the caliper by unscrewing the caliper bolts with a socket set.
- Slide the caliper off the rotor carefully; do not let it hang by the brake line.
- Remove the old brake pads from the caliper bracket.
- Install new brake pads, ensuring they are properly aligned.

4. Inspect and Replace Brake Rotors

Inspect Brake Rotors:
- Check for grooves, cracks, or warping.
Replace Brake Rotors (if necessary):
- Remove the caliper bracket if needed.
- Unscrew the rotor retaining screws and slide the rotor off.
- Clean the hub surface and install the new rotor, securing it with the retaining screws.

5. Reassemble Components

Reinstall the caliper bracket and caliper over the new pads and rotor.
Tighten the caliper bolts to manufacturer's specifications (usually around 25-35 ft-lbs).
Reinstall the wheel and hand-tighten the lug nuts.

6. Final Checks

Lower the vehicle from the jack stands.
Reconnect the negative battery terminal.
Pump the brake pedal several times to seat the new brake pads.