how to tell if my Tesla Model S Original (2012-2020) brakes need to be replaced?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

576 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 identify if your Tesla Model S brakes need replacement. 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 wear safety goggles and gloves when working on brake systems.
•Allow brake components to cool before touching, as they can become very hot after use.

Symptoms

•Brake warning light illuminated on the dashboard
•Squeaking or grinding noise during braking
•Vibration or pulsation felt through the brake pedal
•Reduced braking responsiveness or increased stopping distance
•Brake fluid level is low or discolored
•Brake pads appear worn or have reached the minimum thickness

Diagnostic Steps

1
Inspect the brake warning light on the dashboard to check for alerts.
2
Visually inspect the brake pads through the wheel spokes for thickness and wear indicators.
3
Check the brake fluid reservoir for level and contamination.
4
Listen for any unusual noises while applying the brakes during a test drive.
5
Feel for vibrations or pulsations in the brake pedal during braking.
6
Measure the brake pad thickness using a caliper to ensure they meet the manufacturer's specifications.

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
•C-clamp or brake caliper tool
•Torque wrench

Parts Required

•New brake pads
•Optional: new brake rotors if worn

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Symptoms

•Brake warning light illuminated on the dashboard

•Squeaking or grinding noise during braking

•Vibration or pulsation felt through the brake pedal

•Reduced braking responsiveness or increased stopping distance

•Brake fluid level is low or discolored

•Brake pads appear worn or have reached the minimum thickness

Diagnostic Steps

1
Inspect the brake warning light on the dashboard to check for alerts.
2
Visually inspect the brake pads through the wheel spokes for thickness and wear indicators.
3
Check the brake fluid reservoir for level and contamination.
4
Listen for any unusual noises while applying the brakes during a test drive.
5
Feel for vibrations or pulsations in the brake pedal during braking.
6
Measure the brake pad thickness using a caliper to ensure they meet the manufacturer's specifications.

Solution

1. Preparation

Gather necessary tools and safety equipment.
Ensure the vehicle is parked on a level surface and the parking brake is engaged.
Use wheel chocks to prevent movement.

2. Remove the Wheel

Use a lug wrench to loosen the wheel lug nuts slightly before lifting the vehicle.
Raise the vehicle using a jack and secure it on jack stands.
Remove the lug nuts completely and take off the wheel.

3. Inspect and Replace Brake Pads

Inspect the Brake Pads:
- Check the thickness; if it's below 3 mm, replacement is necessary.
- Look for uneven wear patterns or cracks.
Replace the Brake Pads:
- Remove the caliper mounting bolts using a socket set.
- Slide the caliper off the brake rotor and suspend it using a bungee cord to avoid straining the brake line.
- Remove the old brake pads from the caliper bracket.
- Install new brake pads, ensuring they are correctly oriented.
- Use a C-clamp to compress the caliper piston if necessary to fit the new pads.

4. Reassemble Components

Reattach the caliper over the new brake pads and tighten the caliper mounting bolts to the manufacturer’s torque specifications (usually around 25-35 ft-lbs, but check the service manual).
Reinstall the wheel and hand-tighten the lug nuts.

5. Lower the Vehicle and Final Check

Lower the vehicle from the jack stands and remove the jack.
Torque the lug nuts to the manufacturer's specifications (typically 75-100 ft-lbs).