my Tesla Model 3 Highland (2024-present) makes a grinding noise when braking

Tesla Model 3 Highland (2024-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

527 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

•Always disconnect the battery before working on electrical systems.
•Allow the vehicle to cool before working on the brakes.

Symptoms

•Grinding noise during braking
•Vibration felt through the brake pedal
•Reduced braking performance
•Warning light illuminated on the dashboard
•Increased stopping distance

Diagnostic Steps

1
Inspect brake pads for wear and tear using a visual inspection.
2
Check brake rotor condition for scoring or warping.
3
Examine brake calipers for proper operation and any obstructions.
4
Use an OBD-II scanner to check for any related error codes.
5
Inspect brake fluid level and condition in the reservoir.
6
Check for any debris or foreign objects lodged in the brake assembly.

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

•Lug wrench
•Jack and jack stands
•Socket set
•Torque wrench
•OBD-II scanner

Parts Required

•Brake pads
•Brake rotors (if worn)

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Diagnostic Steps

1
Inspect brake pads for wear and tear using a visual inspection.
2
Check brake rotor condition for scoring or warping.
3
Examine brake calipers for proper operation and any obstructions.
4
Use an OBD-II scanner to check for any related error codes.
5
Inspect brake fluid level and condition in the reservoir.
6
Check for any debris or foreign objects lodged in the brake assembly.

Solution

1. Preparation

Gather tools and parts needed.
Ensure the vehicle is parked on a flat surface and secure it with wheel chocks.
Disconnect the negative terminal of the battery for safety.

2. Remove Wheel

Use a lug wrench to loosen the lug nuts.
Lift the vehicle using a jack and secure it with jack stands.
Completely remove the lug nuts and take off the wheel.

3. Inspect and Replace Brake Pads

Inspection: Remove the brake caliper by unscrewing the caliper bolts with a socket set.
Check Pads: Inspect the brake pads for wear; replace if the friction material is below 3mm.
Replacement:
- If replacement is needed, slide out the old pads and insert new ones.
- Ensure the pads are properly seated in the caliper.

4. Inspect and Replace Rotors (if necessary)

Inspection: Check the brake rotors for any scoring or excessive wear.
Replacement (if worn):
- Remove the rotor by unscrewing any retaining screws and sliding it off the hub.
- Install the new rotor, ensuring it is clean and properly seated.

5. Reinstall Caliper and Wheel

Reattach the brake caliper, ensuring it is secured with the proper torque specifications (typically 25-30 ft-lbs).
Place the wheel back on and hand-tighten the lug nuts.
Lower the vehicle and then use the torque wrench to tighten the lug nuts to the manufacturer’s specifications (usually 100-120 ft-lbs).

6. Final Steps

Reconnect the negative battery terminal.
Pump the brake pedal a few times to ensure proper brake engagement.