why does my Tesla Model S Original (2012-2020) make a loud noise when braking

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

537 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 noise in Tesla Model S (2012-2020). 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

•Always wear safety glasses and gloves when working on vehicle brakes.
•Ensure the vehicle is securely lifted and supported before working underneath.

Symptoms

•Loud grinding or squealing noise during braking
•Reduced braking efficiency
•Vibration or pulsation in the brake pedal
•Brake warning light illuminated on the dashboard
•Unusual heat emanating from the brake components

Diagnostic Steps

1
Inspect brake pads for wear and tear using a visual inspection.
2
Check brake rotors for warping or scoring.
3
Examine brake calipers for proper function and signs of sticking.
4
Use an OBD-II scanner to check for any related error codes.
5
Inspect brake fluid level and condition in the reservoir.
6
Test drive the vehicle to replicate the noise while monitoring braking performance.

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
•Brake grease
•OBD-II scanner
•Micrometer

Parts Required

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

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Diagnostic Steps

1
Inspect brake pads for wear and tear using a visual inspection.
2
Check brake rotors for warping or scoring.
3
Examine brake calipers for proper function and signs of sticking.
4
Use an OBD-II scanner to check for any related error codes.
5
Inspect brake fluid level and condition in the reservoir.
6
Test drive the vehicle to replicate the noise while monitoring braking performance.

Solution

1. Preparation

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

2. Inspect and Replace Brake Pads

Inspect pads: Remove the wheel using a socket set to access the brake components.
Measure thickness: If brake pads are less than 3mm, replace them.
Remove old pads: Unbolt the caliper bracket using a torque wrench, then slide out the old pads.
Install new pads: Lubricate the backing plates with brake grease and insert the new pads into the caliper bracket.

3. Inspect and Replace Brake Rotors (if necessary)

Check rotors: Measure rotor thickness with a micrometer. If below minimum spec or if warped, replace.
Remove rotors: Unbolt the rotor from the hub; you may need a hammer to gently tap it off if it's stuck.
Install new rotors: Position the new rotor onto the hub and secure it with bolts according to the manufacturer's torque specifications.

4. Reassemble Braking Components

Reattach caliper: Position the caliper back over the new pads and rotor, securing with bolts using a torque wrench.
Reinstall wheel: Place the wheel back on and tighten the lug nuts to the specified torque.

5. Final Checks

Reconnect battery: Reconnect the negative battery terminal.
Check brake fluid: Ensure the brake fluid level is at the correct mark; top off if necessary.
Test brake function: Before driving, pump the brake pedal several times to seat the pads properly.