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

Tesla Model 3 Highland (2024-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

446 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 ensure the vehicle is securely supported before working underneath it.
•Allow the brake components to cool before touching them after use.

Symptoms

•Grinding noise during braking
•Reduced braking performance
•Vibration in the brake pedal
•Warning light on the dashboard (if applicable)
•Increased stopping distance

Diagnostic Steps

1
Inspect brake pads for wear and tear using a visual inspection.
2
Check brake rotors for scoring or warping.
3
Examine brake fluid levels and condition.
4
Look for any debris or foreign objects lodged in the brake components.
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

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

Parts Required

•Brake pads
•Brake rotors (if necessary)
•Brake fluid (if needed)

Related Faults

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Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is parked on a flat surface and secured with wheel chocks.
Disconnect the negative terminal of the battery to prevent electrical issues.

2. Inspect and Replace Brake Pads

Sub-steps:
1. Remove the wheel using a socket set.
2. Inspect the brake pads for thickness; replace if below the minimum thickness (usually 3mm).
3. If replacement is needed, remove the caliper bolts with a socket wrench.
4. Carefully slide the caliper off and support it without straining the brake line.
5. Remove the old brake pads and install new ones, ensuring proper alignment.
6. Reinstall the caliper and torque bolts to manufacturer specifications (usually around 25-30 ft-lbs).

3. Inspect and Replace Brake Rotors (if necessary)

Sub-steps:
1. If rotors are scored or warped, remove them by taking off the caliper bracket bolts.
2. Slide the rotor off the hub.
3. Install new rotors, ensuring they are clean and free of oil.
4. Reattach the caliper bracket and torque to specifications.

4. Reassemble

Reinstall the wheel and torque the lug nuts to the manufacturer's specifications (usually 100-120 ft-lbs).
Reconnect the negative battery terminal.