why does my Tesla Model S Original (2012-2020) have a burning smell

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

568 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 burning smell issues in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures 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 hot components

Symptoms

•Burning smell inside the cabin
•Possible warning lights on the dashboard
•Reduced performance or power loss
•Increased heat emanating from specific areas (e.g., motor, battery)
•Strange noises accompanying the burning smell

Diagnostic Steps

1
Inspect the cabin for sources of burning smell (e.g., burnt wiring, plastic, or insulation)
2
Check for any error codes using the onboard diagnostics system
3
Examine the battery pack and motor for signs of overheating or damage
4
Inspect the brake system for overheated components, particularly brake pads and rotors
5
Review fluid levels and inspect for any leaks (coolant, oil, etc.) that may be burning on hot surfaces

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
•Socket set
•Flashlight
•Safety gloves
•Safety goggles

Parts Required

•Replacement wiring (if needed)
•Brake pads (if worn)
•Brake rotors (if needed)
•Fluids (e.g., coolant, oil)

Related Faults

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Diagnostic Steps

1
Inspect the cabin for sources of burning smell (e.g., burnt wiring, plastic, or insulation)
2
Check for any error codes using the onboard diagnostics system
3
Examine the battery pack and motor for signs of overheating or damage
4
Inspect the brake system for overheated components, particularly brake pads and rotors
5
Review fluid levels and inspect for any leaks (coolant, oil, etc.) that may be burning on hot surfaces

Solution

1. Preparation

Gather tools: OBD-II scanner, multimeter, socket set, flashlight, safety gloves, and safety goggles.
Ensure the vehicle is parked on a flat surface, and the ignition is turned off.
Disconnect the vehicle from the charger.

2. Inspect and Identify the Source

Sub-step 1: Use a flashlight to visually inspect the wiring harness and connectors for any signs of melting or scorching.
Sub-step 2: Use the OBD-II scanner to check for any fault codes that may indicate electrical issues.
Sub-step 3: If overheating is suspected at the battery, carefully allow the vehicle to cool down before further inspection.

3. Address Electrical Issues

Sub-step 1: If any damaged wiring is found, carefully cut and remove the damaged section.
Sub-step 2: Use appropriate gauge wiring to splice in new sections, ensuring all connections are secure and insulated.
Sub-step 3: Test the wiring with a multimeter for continuity.

4. Inspect and Replace Overheated Components

Sub-step 1: For overheating brakes, remove the wheel and inspect the brake pads and rotors for excessive wear.
Sub-step 2: Replace worn brake pads and resurface or replace the rotors as necessary.
Sub-step 3: Reassemble the wheel and ensure proper torque specifications are followed.

5. Clean and Refill Fluids

Sub-step 1: If fluid leaks are found, identify the source (e.g., coolant reservoir, oil pan) and replace any damaged components.
Sub-step 2: Clean any burnt fluid residue from hot surfaces using appropriate cleaners.
Sub-step 3: Refill any low fluid levels with the manufacturer's recommended fluids.