my Tesla Model S Original (2012-2020) rear brakes grinding what should I do

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

563 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 rear brakes on Tesla Model S (2012-2020). 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 vehicle's battery before working on the braking system.
•Allow the brakes to cool before inspection or repair to avoid burns.

Symptoms

•Grinding noise when braking
•Reduced braking efficiency
•Vibration in the brake pedal
•Brake warning light illuminated on the dashboard
•Increase in stopping distance

Diagnostic Steps

1
Inspect the rear brake pads for wear using visual inspection.
2
Check the rear brake rotors for signs of scoring or warping.
3
Verify brake fluid level and condition in the reservoir.
4
Listen for any unusual noises while applying brakes at low speeds.
5
Check for any error codes related to the braking system using an OBD-II scanner.

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

•Floor jack
•Jack stands
•Lug wrench
•Socket set
•Torque wrench
•Brake cleaner
•Bungee cord

Parts Required

•Rear brake pads
•Rear brake rotors

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Diagnostic Steps

1
Inspect the rear brake pads for wear using visual inspection.
2
Check the rear brake rotors for signs of scoring or warping.
3
Verify brake fluid level and condition in the reservoir.
4
Listen for any unusual noises while applying brakes at low speeds.
5
Check for any error codes related to the braking system using an OBD-II scanner.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface and the parking brake is engaged.
Wear safety gloves and goggles.

2. Raise and Secure the Vehicle

Use a floor jack to lift the rear of the vehicle.
Secure with jack stands to prevent any movement.

3. Remove Wheel

Using a lug wrench, remove the rear wheel by loosening the lug nuts in a star pattern.

4. Inspect and Replace Brake Pads

Inspect Brake Pads:
- Check the thickness of the brake pads. If less than 3 mm, they need replacing.
Remove Brake Caliper:
- Using a socket set, remove the caliper bolts and carefully slide the caliper off the rotor.
- Support the caliper with a bungee cord or similar to avoid straining the brake line.
Replace Brake Pads:
- Remove old pads from the caliper bracket.
- Install new pads in the same orientation as the old ones.

5. Inspect and Replace Brake Rotors (if necessary)

Remove Rotor:
- If the rotor is damaged, remove it by unscrewing the retaining screws (if applicable) and pulling the rotor off the hub.
Install New Rotor:
- Clean the new rotor with brake cleaner to remove any protective coating.
- Install the new rotor onto the hub and secure it with the retaining screws.

6. Reassemble Components

Reinstall the brake caliper over the new pads and torque the caliper bolts to the manufacturer’s specifications.
Replace the wheel and hand-tighten the lug nuts.

7. Lower the Vehicle and Test Brake Function

Carefully lower the vehicle from the jack stands using the floor jack.
Fully tighten the lug nuts in a star pattern to the manufacturer’s recommended torque specifications.