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

592 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 during 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

•Ensure the vehicle is secure on jack stands before working underneath.
•Allow components to cool before handling to avoid burns.

Symptoms

•Grinding noise when braking
•Reduced braking efficiency
•Vibration in the brake pedal
•Illuminated brake warning light on the dashboard
•Unusual wear on brake pads or rotors

Diagnostic Steps

1
Inspect the brake pads for wear and ensure they are not worn down to the backing plate.
2
Check the brake rotors for scoring, warping, or uneven wear.
3
Verify that the brake calipers are functioning correctly and not sticking.
4
Inspect brake fluid levels and condition; look for contamination or air bubbles.
5
Scan the vehicle for any diagnostic trouble codes (DTCs) related to the braking system.

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

•Lug wrench
•Jack and jack stands
•Socket set
•Brake tool (caliper compressor)
•Brake cleaner

Parts Required

•Brake pads
•Brake rotors (if needed)

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Diagnostic Steps

1
Inspect the brake pads for wear and ensure they are not worn down to the backing plate.
2
Check the brake rotors for scoring, warping, or uneven wear.
3
Verify that the brake calipers are functioning correctly and not sticking.
4
Inspect brake fluid levels and condition; look for contamination or air bubbles.
5
Scan the vehicle for any diagnostic trouble codes (DTCs) related to the braking system.

Solution

1. Preparation

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

2. Inspect and Replace Brake Pads

Remove Wheel:
- Use a lug wrench to loosen wheel nuts.
- Lift the vehicle with a jack and secure it with jack stands.
- Remove the wheel.
Inspect Brake Pads:
- Check the thickness of the brake pads; if less than 3mm, they should be replaced.
- Remove the caliper bolts using a socket set.
- Carefully slide the caliper off the rotor and support it to avoid straining the brake line.
Replace Brake Pads:
- Remove the old brake pads from the caliper bracket.
- Insert new brake pads into the caliper bracket.
- Compress the caliper piston using a brake tool to make room for the new pads.

3. Inspect and Replace Brake Rotors (if necessary)

Check Rotor Condition:
- Inspect for any grooves, cracks, or signs of warping.
Remove Rotors:
- If replacement is needed, remove the rotor by unscrewing any retaining screws and sliding it off the hub.
Install New Rotors:
- Clean the new rotor with brake cleaner to remove any protective oil.
- Install the new rotor onto the hub and secure with retaining screws.

4. Reinstall Components

Reattach Caliper:
- Position the caliper back over the new brake pads and rotor.
- Tighten the caliper bolts to the manufacturer’s torque specifications (typically around 25-35 ft-lbs).
Reinstall Wheel:
- Place the wheel back onto the hub and hand-tighten the lug nuts.
- Lower the vehicle and then torque the lug nuts to the manufacturer’s specifications (usually 90-120 ft-lbs).

5. Final Checks

Reconnect the battery.
Start the vehicle and pump the brake pedal a few times to ensure proper pad seating.
Check brake fluid levels and top off if necessary.