why does my Tesla Model S Plaid/Refresh (2021-present) have a strange smell when I brake?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

530 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 strange smells when braking in Tesla Model S Plaid/Refresh. 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 the braking system.
•Ensure the vehicle is securely lifted and supported before working under it.

Symptoms

•Strange or burnt smell when braking
•Reduced braking effectiveness
•Brake pedal feels spongy or unresponsive
•Brake warning light illuminated on the dashboard
•Excessive dust accumulation on wheels

Diagnostic Steps

1
Inspect brake pads for wear and tear using a visual inspection.
2
Check brake fluid level and condition in the master cylinder reservoir.
3
Scan for any error codes using the Tesla service menu.
4
Inspect brake rotors for warping or scoring.
5
Examine the brake calipers for proper operation and possible leaks.

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

•Socket set
•Torque wrench
•Turkey baster
•Brake fluid tester (optional)
•Micrometer

Parts Required

•Brake pads
•Brake rotors (if necessary)
•Brake fluid (DOT 3 or 4)

Related Faults

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Diagnostic Steps

1
Inspect brake pads for wear and tear using a visual inspection.
2
Check brake fluid level and condition in the master cylinder reservoir.
3
Scan for any error codes using the Tesla service menu.
4
Inspect brake rotors for warping or scoring.
5
Examine the brake calipers for proper operation and possible leaks.

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is parked on a flat surface and securely lifted using jack stands.
Disconnect the negative terminal of the battery to avoid electrical issues during inspection.

2. Inspect and Replace Brake Pads

Sub-steps:
1. Remove the wheel to access the brake assembly.
2. Unbolt the caliper using a socket set and carefully lift it away from the rotor.
3. Inspect the brake pads for thickness; if they are worn down to the wear indicators, replace them.
4. Remove old pads and install new pads, ensuring they are properly aligned.
5. Reattach the caliper and torque bolts to manufacturer specifications (typically around 25-30 ft-lbs).

3. Check and Replace Brake Fluid

Sub-steps:
1. Locate the brake fluid reservoir and clean the area around it.
2. Remove the cap and check fluid condition; if it's dark or contaminated, it should be replaced.
3. Use a turkey baster to extract old fluid from the reservoir.
4. Fill the reservoir with fresh brake fluid (DOT 3 or 4, as specified by Tesla).
5. Bleed the brake lines if necessary to remove any air bubbles.

4. Inspect and Resurface/Replace Rotors

Sub-steps:
1. Measure rotor thickness with a micrometer; if below the minimum specification, replace the rotor.
2. If the rotor is still within spec but has scoring, it may be resurfaced by a qualified machine shop.
3. Reinstall the rotor after resurfacing or replacing, ensuring it is torqued correctly.