why does my Tesla Model S Plaid/Refresh (2021-present) 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

532 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 noise when braking in Tesla Model S Plaid. 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 ensure the vehicle is secured on jack stands before working underneath.
•Allow the brake system to cool before inspection or repair to avoid burns.

Symptoms

•Loud grinding or squeaking noise when applying brakes
•Reduced braking efficiency or responsiveness
•Brake warning light illuminated on the dashboard
•Vibration or pulsation in the brake pedal
•Unusual wear patterns on brake pads or rotors

Diagnostic Steps

1
Inspect brake pads for wear or damage by removing the wheel.
2
Check the condition of the brake rotors for scoring or warping.
3
Examine brake calipers for proper function and any signs of sticking or leaks.
4
Inspect brake fluid level and condition in the master cylinder reservoir.
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

•Jack and jack stands
•Socket set
•Torque wrench
•Brake cleaner
•Micrometer

Parts Required

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

Related Faults

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Diagnostic Steps

1
Inspect brake pads for wear or damage by removing the wheel.
2
Check the condition of the brake rotors for scoring or warping.
3
Examine brake calipers for proper function and any signs of sticking or leaks.
4
Inspect brake fluid level and condition in the master cylinder reservoir.
5
Use an OBD-II scanner to check for any related error codes.

Solution

1. Preparation

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

2. Wheel Removal

Use a jack to lift the vehicle and secure it with jack stands.
Remove the lug nuts using a socket wrench and take off the wheel.

3. Brake Pad and Rotor Inspection

Visually inspect brake pads for thickness; replace if less than 3mm.
Measure rotor thickness using a micrometer; replace if below manufacturer specifications.
Check for any scoring or rust on the rotor surface; resurface or replace as necessary.

4. Brake Pad Replacement

Remove the caliper bolts using a socket set and lift the caliper away from the rotor.
Remove old brake pads from the caliper bracket.
Apply brake grease to the back of the new pads to reduce noise.
Install new brake pads into the caliper bracket.

5. Brake Rotor Replacement (if necessary)

Remove the caliper bracket bolts and take off the caliper bracket.
Remove the old rotor from the hub.
Install the new rotor, ensuring it is seated properly.

6. Reassembly

Reattach the caliper bracket and caliper, torquing bolts to the manufacturer's specifications (typically around 25-30 ft-lbs).
Reinstall the wheel and lug nuts, tightening to the specified torque (usually about 100 ft-lbs).
Lower the vehicle and reconnect the battery terminal.