why does my Tesla Model 3 Original (2017-2023) make a loud noise when braking

Tesla Model 3 Highland (2024-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

514 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

Discover how to diagnose and fix loud braking noises in Tesla Model 3 (2017-2023). Step-by-step guide with symptoms, diagnostic steps, 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 electrical components.
•Allow the brake components to cool before handling to avoid burns.

Symptoms

•Loud grinding or squeaking noise when brakes are applied
•Reduced braking efficiency or responsiveness
•Vibration or pulsation felt in the brake pedal
•Illuminated brake warning light on the dashboard
•Brake dust accumulation on wheels

Diagnostic Steps

1
Inspect brake pads for wear and tear using a visual examination.
2
Check the brake rotors for scoring, warping, or damage.
3
Examine the brake calipers for proper operation and any signs of leakage.
4
Test the brake fluid level 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

•OBD-II scanner
•Socket set
•Torque wrench
•Brake fluid reservoir funnel

Parts Required

•Brake pads
•Brake rotors
•Brake fluid (DOT 3 or DOT 4)

Related Faults

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Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and set the parking brake.
Disconnect the negative terminal of the battery to prevent electrical issues.

2. Inspect and Replace Brake Pads

Sub-steps:
1. Remove the wheel to access the brake assembly (use a socket set).
2. Remove the caliper bolts and carefully take off the caliper (use a torque wrench for correct reassembly).
3. Inspect the brake pads; if they are worn down (less than 3mm thickness), replace them.
4. To replace, remove the old pads and install new ones, ensuring they are seated correctly.

3. Inspect and Replace Brake Rotors

Sub-steps:
1. Check the rotor for any visible damage or uneven wear.
2. If damaged, remove the rotor from the hub (use a rotor puller if necessary).
3. Install the new rotor, ensuring it is properly aligned.
4. Reattach the caliper and tighten the caliper bolts to the manufacturer’s specifications.

4. Check Brake Fluid

Sub-steps:
1. Locate the brake fluid reservoir and check the fluid level.
2. If low, top off with the recommended brake fluid (DOT 3 or DOT 4 as specified in the owner's manual).
3. Inspect the fluid for contamination; if discolored, consider a complete brake fluid flush.

5. Reassemble and Test

Sub-steps:
1. Reinstall the wheel and secure the lug nuts (use a torque wrench for proper torque settings).
2. Reconnect the negative battery terminal.
3. Start the vehicle and pump the brake pedal several times to ensure proper brake function.