my Tesla Model S Plaid/Refresh (2021-present) is making 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 when braking in Tesla Model S Plaid. 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

•Always allow the brakes to cool before working on them to avoid burns.
•Ensure the vehicle is securely supported on jack stands before starting any work.

Symptoms

•Grinding noise when applying brakes
•Vibration felt in the brake pedal
•Reduced braking efficiency or responsiveness
•Brake warning light illuminated on the dashboard
•Increased stopping distance

Diagnostic Steps

1
Inspect brake pads for wear and tear using visual inspection.
2
Check brake rotor condition for scoring or uneven wear.
3
Examine brake calipers for proper operation and any signs of damage.
4
Inspect brake fluid level and condition in the reservoir.
5
Use a multimeter to test brake pad wear sensors if equipped.

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 caliper tool
•Jack and jack stands
•Multimeter

Parts Required

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

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Diagnostic Steps

1
Inspect brake pads for wear and tear using visual inspection.
2
Check brake rotor condition for scoring or uneven wear.
3
Examine brake calipers for proper operation and any signs of damage.
4
Inspect brake fluid level and condition in the reservoir.
5
Use a multimeter to test brake pad wear sensors if equipped.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Ensure the vehicle is parked on a level surface and the parking brake is engaged.
Disconnect the negative battery terminal to prevent electrical issues.

2. Remove Wheel

Using a socket set, loosen the lug nuts on the affected wheel while the vehicle is on the ground.
Raise the vehicle using a jack and secure it with jack stands.
Completely remove the lug nuts and take off the wheel to access the brake components.

3. Inspect and Replace Brake Pads

Inspection:
- Remove the brake caliper bolts using a socket wrench.
- Carefully slide the caliper off the rotor without disconnecting the brake line.
- Check the brake pads for thickness; if less than 3mm, replace them.
Replacement:
- If replacing, compress the caliper piston using a brake caliper tool to allow room for new pads.
- Install new brake pads, ensuring they are positioned correctly in the caliper bracket.

4. Inspect and Replace Brake Rotors (if necessary)

Check the brake rotors for any grooves or warping. If the surface is damaged or below minimum thickness, replace them.
To replace, remove the rotor by unscrewing any retaining screws and sliding it off the hub.
Install the new rotor, ensuring it is seated correctly against the hub.

5. Reassemble and Reinstall Wheel

Reattach the caliper over the new pads and ensure it is secured with bolts to the specified torque (typically around 25-35 ft-lbs, but consult specifications).
Reinstall the wheel and hand-tighten the lug nuts before lowering the vehicle.
Once on the ground, torque the lug nuts to the manufacturer's specifications (usually around 80-100 ft-lbs).

6. Final Checks

Reconnect the negative battery terminal.
Check brake fluid levels and top off if necessary.
Test the brakes by applying pressure to ensure they are functioning properly before driving.