my Tesla Model S Original (2012-2020) is making a loud noise when I brake what's going on

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

546 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 loud brake noise in 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 12V battery before working on the brake system.
•Allow the brakes to cool before inspection or replacement.

Symptoms

•Loud grinding or squeaking noise when brakes are applied
•Reduced braking efficiency
•Vibration in the brake pedal
•Warning lights illuminated on the dashboard
•Visible wear or damage on brake pads or rotors

Diagnostic Steps

1
Inspect the brake pads for wear or damage.
2
Check the brake rotors for scoring or warping.
3
Scan for any error codes using an OBD-II scanner to identify potential electronic issues.
4
Examine the brake calipers for proper operation and any signs of sticking.
5
Verify brake fluid levels and check for any leaks in the brake lines.

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
•Torque wrench

Parts Required

•Brake pads
•Brake rotors

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Diagnostic Steps

1
Inspect the brake pads for wear or damage.
2
Check the brake rotors for scoring or warping.
3
Scan for any error codes using an OBD-II scanner to identify potential electronic issues.
4
Examine the brake calipers for proper operation and any signs of sticking.
5
Verify brake fluid levels and check for any leaks in the brake lines.

Solution

1. Preparation

Park the vehicle on a level surface and set the parking brake.
Gather necessary tools and parts.
Wear safety gloves and goggles.

2. Remove Wheel

Use a lug wrench to loosen the wheel lug nuts slightly (do not remove them completely).
Raise the vehicle using a jack and secure it with jack stands.
Remove the lug nuts and take the wheel off.

3. Inspect and Replace Brake Pads

Locate the brake caliper and remove the caliper mounting bolts using a socket set.
Carefully slide the caliper off the rotor and suspend it using a bungee cord or similar to avoid straining the brake line.
Inspect brake pads for thickness; replace if they are below the manufacturer's recommended thickness (usually 3-4 mm).
If replacing, remove the old pads and install new ones in the same orientation as the old ones.

4. Inspect and Replace Brake Rotors (if necessary)

Check the rotor surface for grooves or warping. Measure with a micrometer if needed.
If replacement is required, remove the rotor by unscrewing it from the hub.
Clean the new rotor with brake cleaner to remove any protective coating.
Install the new rotor and torque the screws to the manufacturer's specifications.

5. Reassemble and Test

Reinstall the brake caliper over the new pads and secure it with the mounting bolts.
Reattach the wheel and hand-tighten the lug nuts.
Lower the vehicle and fully tighten the lug nuts in a crisscross pattern to ensure even pressure.
Repeat the process on the opposite side if needed.