why does my Tesla Model S Original (2012-2020) 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

582 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 (2012-2020). 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 battery before working on electrical components.
•Ensure the vehicle is securely lifted and supported before removing wheels.

Symptoms

•Grinding noise when applying brakes
•Reduced braking efficiency
•Vibration or pulsation in the brake pedal
•Warning lights on the dashboard (e.g., brake warning light)
•Increased stopping distance
•Dust or debris accumulation on brake components

Diagnostic Steps

1
Inspect brake pads for wear and tear using visual examination.
2
Check brake rotors for scoring, warping, or damage.
3
Examine calipers for proper function and any signs of sticking or misalignment.
4
Inspect brake fluid levels and condition.
5
Use a multimeter to check the brake sensor functionality if applicable.
6
Test drive the vehicle at low speed to reproduce the noise while observing brake performance.

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
•Multimeter (if needed)
•Bungee cord or similar for caliper support

Parts Required

•New brake pads
•New brake rotors (if necessary)
•Brake cleaner

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Diagnostic Steps

1
Inspect brake pads for wear and tear using visual examination.
2
Check brake rotors for scoring, warping, or damage.
3
Examine calipers for proper function and any signs of sticking or misalignment.
4
Inspect brake fluid levels and condition.
5
Use a multimeter to check the brake sensor functionality if applicable.
6
Test drive the vehicle at low speed to reproduce the noise while observing brake performance.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and engage the parking brake.
Disconnect the negative terminal of the battery for safety.

2. Remove Wheel

Use a jack to lift the vehicle and secure it on jack stands.
Remove the wheel using a socket set to access the brake components.

3. Inspect and Replace Brake Pads

Sub-steps:
1. Remove the caliper bolts using a socket wrench.
2. Carefully slide the caliper off the rotor and suspend it using a bungee cord to avoid strain on the brake line.
3. Inspect the brake pads for wear; if they are worn below the manufacturer's specifications, replace them.
4. If replacing, remove the old brake pads and install new ones, ensuring they are oriented correctly.

4. Inspect and Resurface/Replace Brake Rotors

Sub-steps:
1. Check the rotor surface for any grooves or scoring.
2. Use a micrometer to measure rotor thickness; if below specifications, replace the rotor.
3. If the rotor is within specifications but has minor wear, consider resurfacing it.
4. Install the rotor back onto the hub if it was replaced or resurfaced.

5. Reassemble Components

Sub-steps:
1. Reconnect the caliper over the new brake pads and torque the caliper bolts to the manufacturer's specifications (typically 25-30 ft-lbs).
2. Reinstall the wheel and hand-tighten the lug nuts.
3. Lower the vehicle and torque the lug nuts to the manufacturer's recommended specifications (usually around 100-110 ft-lbs).

6. Final Checks

Sub-steps:
1. Reconnect the negative battery terminal.
2. Pump the brake pedal several times to restore brake pressure.
3. Test the brakes at low speed to ensure the grinding noise is resolved.