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

428 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 (2021-present). 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 high-voltage battery before working on braking systems to prevent electrical shock.
•Allow the vehicle to cool down before handling brake components to avoid burns.

Symptoms

•Grinding noise during braking, particularly at low speeds
•Vibration felt through the brake pedal
•Reduced braking efficiency
•Brake warning light may be illuminated on the dashboard
•Possible increased stopping distance

Diagnostic Steps

1
Inspect brake pads for wear using visual inspection through wheel spokes.
2
Check brake rotor surface for scoring or damage.
3
Examine brake calipers for proper operation and alignment.
4
Inspect brake fluid level and condition.
5
Scan for any relevant error codes using an OBD-II scanner to check for electronic issues.

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 cleaner
•Micrometer

Parts Required

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

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Diagnostic Steps

1
Inspect brake pads for wear using visual inspection through wheel spokes.
2
Check brake rotor surface for scoring or damage.
3
Examine brake calipers for proper operation and alignment.
4
Inspect brake fluid level and condition.
5
Scan for any relevant error codes using an OBD-II scanner to check for electronic issues.

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a level surface and engage the parking brake.
Disconnect the high-voltage battery for safety.

2. Inspect Brake Pads

Remove the wheel using a socket set.
Check the brake pads for wear; replace if thickness is less than 3mm.
Clean any debris from the brake pad area.

3. Check Brake Rotors

Inspect the rotors for scoring or warping; measure rotor thickness using a micrometer.
If damage is found, proceed to replace the rotors.
Clean the rotor surface with brake cleaner to remove any contaminants.

4. Examine Brake Calipers

Inspect the calipers for signs of leakage or rust.
Ensure the caliper slides are moving freely; lubricate if necessary.
Reinstall the calipers ensuring they are properly aligned.

5. Reassemble and Test

Reinstall the wheel and torque the lug nuts to the manufacturer’s specification.
Reconnect the high-voltage battery.
Test the brakes at low speeds to ensure noise is eliminated.