my Tesla Model 3 Original (2017-2023) makes a grinding noise when braking

Tesla Model 3 Highland (2024-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

604 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 (2017-2023). 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 brake components to cool before handling to avoid burns.

Symptoms

•Grinding noise when applying brakes
•Reduced braking efficiency
•Vibration felt through the brake pedal
•Brake 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 rotors for scoring or damage with a caliper.
3
Examine brake fluid level and condition in the reservoir.
4
Scan the vehicle for any diagnostic trouble codes (DTCs) related to the braking system.
5
Check for debris or foreign objects lodged in the brake assembly.
6
Inspect brake calipers for proper operation and any signs of leakage.

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
•Brake cleaner
•Bungee cord

Parts Required

•New brake pads
•New brake rotors (if worn)
•Brake fluid (if needed)

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Diagnostic Steps

1
Inspect brake pads for wear and tear using a visual inspection.
2
Check brake rotors for scoring or damage with a caliper.
3
Examine brake fluid level and condition in the reservoir.
4
Scan the vehicle for any diagnostic trouble codes (DTCs) related to the braking system.
5
Check for debris or foreign objects lodged in the brake assembly.
6
Inspect brake calipers for proper operation and any signs of leakage.

Solution

1. Preparation

Gather required tools and parts.
Park the vehicle on a flat surface and ensure it is in "Park" mode.
Disconnect the vehicle's 12V battery to prevent accidental activation of the brake system.

2. Remove Wheel Assembly

Sub-steps:
1. Loosen the lug nuts on the affected wheel using a lug wrench.
2. Raise the vehicle with a jack and secure it on jack stands.
3. Remove the lug nuts completely and take off the wheel.

3. Inspect and Replace Brake Pads

Sub-steps:
1. Remove the caliper bolts using a socket set and carefully take off the caliper.
2. Hang the caliper with a bungee cord to avoid straining the brake line.
3. Remove the old brake pads from the caliper bracket.
4. Inspect the caliper for any damage or sticking.
5. Install new brake pads, ensuring they are properly seated in the caliper bracket.

4. Inspect and Replace Brake Rotors (if necessary)

Sub-steps:
1. If the rotors are scored or worn beyond specifications, remove the rotor by unscrewing the retaining screws.
2. Clean the hub surface with brake cleaner to ensure proper seating of the new rotor.
3. Install a new rotor, ensuring it is aligned correctly and secure it with retaining screws.

5. Reassemble Brake Components

Sub-steps:
1. Reinstall the caliper over the new brake pads and tighten the caliper bolts to the manufacturer’s torque specifications (typically around 25-35 Nm).
2. Reinstall the wheel and hand-tighten the lug nuts.
3. Lower the vehicle from the jack stands and tighten the lug nuts to the specified torque (usually 110 Nm).

6. Reconnect Battery and Test

Reconnect the vehicle's 12V battery.
Start the vehicle and test the brake system by applying the brakes gently to ensure proper function and listen for any abnormal noises.