why do my Tesla Model S Original (2012-2020) brake pads wear unevenly

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

535 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 uneven brake pad wear 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 battery before working on the braking system.
•Allow the vehicle to cool before working on brake components.

Symptoms

•Uneven thickness of brake pads on either side of the vehicle
•Increased brake noise or squealing during braking
•Vibration or pulsation felt in the brake pedal
•Vehicle pulling to one side when braking
•Reduced braking efficiency or response time

Diagnostic Steps

1
Inspect the brake pads visually for uneven wear patterns.
2
Check brake calipers for proper operation and signs of sticking.
3
Examine the brake rotors for warping or uneven surfaces.
4
Inspect the suspension components for wear or damage that could affect brake alignment.
5
Check brake fluid level and condition in the master cylinder reservoir.
6
Perform a test drive to assess brake performance and any pulling sensations.

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 cleaner
•High-temperature brake grease

Parts Required

•New brake pads
•Optional: New rotors if they are worn or damaged

Related Faults

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Diagnostic Steps

1
Inspect the brake pads visually for uneven wear patterns.
2
Check brake calipers for proper operation and signs of sticking.
3
Examine the brake rotors for warping or uneven surfaces.
4
Inspect the suspension components for wear or damage that could affect brake alignment.
5
Check brake fluid level and condition in the master cylinder reservoir.
6
Perform a test drive to assess brake performance and any pulling sensations.

Solution

1. Preparation

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

2. Remove the Wheel

Using a lug wrench, loosen the lug nuts while the vehicle is still on the ground.
Lift the vehicle with a jack and secure it with jack stands.
Remove the lug nuts completely and take off the wheel.

3. Inspect Brake Components

Visually inspect the brake pads and rotors.
Check brake calipers for proper movement; ensure they are not seized.
If necessary, clean the calipers and sliding pins with brake cleaner and lubricate with high-temperature brake grease.

4. Replace Unevenly Worn Brake Pads

Remove the caliper bolts using a socket set and slide the caliper off the rotor.
Remove the old brake pads from the caliper bracket.
Install new brake pads, ensuring they are correctly oriented and seated.

5. Reassemble Components

Reattach the caliper over the new brake pads and tighten the caliper bolts to the manufacturer’s specified torque (typically around 25-30 ft-lbs).
Reinstall the wheel and hand-tighten the lug nuts.
Lower the vehicle and then fully tighten the lug nuts in a star pattern to the manufacturer’s specification.

6. Final Checks

Reconnect the battery terminal.
Pump the brake pedal to ensure proper pad seating and brake engagement.
Test drive the vehicle to confirm proper brake operation.