why does my Tesla Model 3 Highland (2024-present) sound like metal grinding when braking

Tesla Model 3 Highland (2024-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

538 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 the metal 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

•Ensure the vehicle is securely supported by jack stands before working underneath.
•Allow brake components to cool down before touching them after use.

Symptoms

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

Diagnostic Steps

1
Inspect brake pads for wear and damage using a visual inspection.
2
Check brake rotor surface for grooves, rust, or warping.
3
Use an OBD-II scanner to check for any error codes related to the brake system.
4
Verify brake fluid level and condition.
5
Examine brake calipers and hardware for proper operation and mounting.

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

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

Parts Required

•Brake pads
•Brake rotors (if necessary)
•Brake caliper hardware (if worn)

Related Faults

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Diagnostic Steps

1
Inspect brake pads for wear and damage using a visual inspection.
2
Check brake rotor surface for grooves, rust, or warping.
3
Use an OBD-II scanner to check for any error codes related to the brake system.
4
Verify brake fluid level and condition.
5
Examine brake calipers and hardware for proper operation and mounting.

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is parked on a flat surface and the parking brake is engaged.
Disconnect the battery to ensure safety while working on the electrical components.

2. Remove Wheel

Use a jack to lift the vehicle and secure it with jack stands.
Remove the wheel using a socket set to access the brake assembly.

3. Inspect and Replace Brake Pads

Inspect Brake Pads: Check the thickness and condition of the brake pads. If they are worn below the manufacturer’s specification, they need to be replaced.
Remove Old Brake Pads: Use a socket wrench to remove the caliper bolts and slide the caliper off the rotor. Remove the old pads.
Install New Brake Pads: Place new brake pads into the caliper bracket. Ensure they are properly seated.

4. Inspect and Replace Rotors (if necessary)

Check Rotor Condition: If the rotors show signs of wear or damage, remove them by unscrewing any retaining screws and sliding them off the hub.
Install New Rotors: Place new rotors onto the hub and secure them with any retaining screws.

5. Reassemble Brake Components

Reinstall the brake caliper over the new pads and rotor.
Secure caliper bolts to the manufacturer’s torque specifications (typically around 25-35 ft-lbs).
Reinstall the wheel and lower the vehicle back to the ground.

6. Final Checks

Reconnect the battery.
Pump the brake pedal several times to ensure the brake pads seat correctly against the rotors.
Check brake fluid level and top off if necessary.