my Tesla Model S Plaid/Refresh (2021-present) has a grinding noise when braking

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

551 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 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 disconnect the battery before working on the braking system.
•Ensure the vehicle is securely lifted and supported before working underneath.

Symptoms

•Grinding noise when applying brakes
•Reduced braking efficiency
•Vibration in the brake pedal
•Possible warning lights on the dashboard (e.g., brake system warning)
•Increased stopping distance

Diagnostic Steps

1
Inspect brake pads for wear and damage.
2
Check brake rotors for scoring or warping.
3
Examine brake calipers for proper function and any signs of sticking.
4
Use an OBD-II scanner to check for any related error codes.
5
Inspect brake fluid level and condition.
6
Verify if there are any foreign objects lodged in the braking components.

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 (for rotor thickness measurement)

Parts Required

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

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Diagnostic Steps

1
Inspect brake pads for wear and damage.
2
Check brake rotors for scoring or warping.
3
Examine brake calipers for proper function and any signs of sticking.
4
Use an OBD-II scanner to check for any related error codes.
5
Inspect brake fluid level and condition.
6
Verify if there are any foreign objects lodged in the braking components.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface.
Engage the parking brake and disconnect the battery to avoid electrical issues.

2. Remove Wheel

Use a socket set to loosen the lug nuts slightly while the vehicle is still on the ground.
Lift the vehicle with a jack and secure it with jack stands.
Fully remove the lug nuts and take off the wheel.

3. Inspect Brake Components

Brake Pads: Remove the caliper bolts and lift the caliper off the rotor. Inspect the brake pads for wear; replace if they are below the manufacturer’s specifications (usually 3mm or less).
Brake Rotors: Check for grooves or scoring on the rotor surface. If damaged, replace the rotors. Use a micrometer to measure rotor thickness against specifications.
Calipers: Check the caliper movement by sliding it back and forth. If it is stuck, consider rebuilding or replacing the caliper.

4. Replace Components (if necessary)

If brake pads or rotors are worn, replace them:
- Align new brake pads in the caliper bracket.
- Install new rotors by removing the old ones from the hub, ensuring the hub surface is clean for proper contact.
- Reinstall calipers and torque caliper bolts to manufacturer specifications (typically around 25-30 ft-lbs).

5. Reassemble and Test

Place the wheel back on and hand-tighten the lug nuts.
Lower the vehicle and fully tighten the lug nuts in a star pattern to the specified torque (usually around 100-110 ft-lbs).
Reconnect the battery and check the brake fluid level, topping off with the manufacturer-recommended brake fluid if needed.