my Tesla Model S Original (2012-2020) has a burning smell, what should I check?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

553 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 a burning smell in Tesla Model S (2012-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the vehicle to cool down before inspecting the brake system.

Symptoms

•Burning smell inside the cabin or near the vehicle
•Possible smoke or vapor from under the hood or near the wheels
•Warning lights illuminated on the dashboard (e.g., battery or temperature warnings)
•Reduced power or sluggish acceleration
•Electrical system malfunctions (e.g., lights flickering)

Diagnostic Steps

1
Inspect for visible signs of smoke or burning components under the hood and around the vehicle.
2
Use an OBD-II scanner to check for any error codes related to the battery, motor, or electrical systems.
3
Check the state of the 12V battery for any signs of swelling, leaks, or corrosion.
4
Visually inspect wiring harnesses for frayed or damaged wires that may be causing short circuits.
5
Examine the brake system for signs of overheating, especially in the brake pads or calipers.
6
Monitor the battery temperature through the vehicle's diagnostic interface to detect any overheating issues.

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

•OBD-II scanner
•Multimeter
•Basic hand tools (screwdrivers, wrenches)

Parts Required

•Replacement 12V battery (if faulty)
•New wiring (if damaged)
•Brake pads (if worn)

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Symptoms

•Burning smell inside the cabin or near the vehicle

•Possible smoke or vapor from under the hood or near the wheels

•Warning lights illuminated on the dashboard (e.g., battery or temperature warnings)

•Reduced power or sluggish acceleration

•Electrical system malfunctions (e.g., lights flickering)

Diagnostic Steps

1
Inspect for visible signs of smoke or burning components under the hood and around the vehicle.
2
Use an OBD-II scanner to check for any error codes related to the battery, motor, or electrical systems.
3
Check the state of the 12V battery for any signs of swelling, leaks, or corrosion.
4
Visually inspect wiring harnesses for frayed or damaged wires that may be causing short circuits.
5
Examine the brake system for signs of overheating, especially in the brake pads or calipers.
6
Monitor the battery temperature through the vehicle's diagnostic interface to detect any overheating issues.

Solution

1. Preparation

Tools Required: OBD-II scanner, multimeter, basic hand tools (screwdrivers, wrenches).
Ensure the vehicle is parked on a flat surface and turned off.
Disconnect the 12V battery to prevent electrical shock.

2. Inspect and Identify Source of Burning Smell

Sub-steps:
1. Open the front trunk and inspect the wiring harnesses for any visible damage or burnt areas.
2. Check the battery terminals for corrosion or loose connections.
3. Use the multimeter to test the 12V battery voltage. Replace if below 12.4V.

3. Address Electrical Components

Sub-steps:
1. If any damaged wires are found, carefully cut the damaged section and splice in a new wire of the same gauge.
2. Ensure all connections are secure and insulated with electrical tape or heat shrink tubing.

4. Examine Brake System

Sub-steps:
1. Remove the wheel cover to access the brake components.
2. Inspect brake pads and calipers for signs of overheating or wear.
3. Replace any brake pads that show signs of excessive wear and ensure calipers are functioning correctly.

5. Reconnect and Test

Sub-steps:
1. Reconnect the 12V battery.
2. Power on the vehicle and check for any warning lights.
3. Take the vehicle for a test drive to ensure normal operation and monitor for any return of the burning smell.