why does my Tesla Model S Original (2012-2020) have an unusual burning smell while driving

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

502 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 the unusual burning smell 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 12V battery before working on electrical systems.
•Allow the vehicle to cool down before inspecting the drive unit or brakes to avoid burns.

Symptoms

•Unusual burning smell detected during driving
•Possible overheating of electrical components
•Reduced performance or power delivery
•Warning lights illuminated on the dashboard
•Increased heat in the cabin or near the front of the vehicle

Diagnostic Steps

1
Inspect the vehicle for any visible smoke or signs of burning from the battery or electrical components.
2
Check for any diagnostic trouble codes (DTCs) using an OBD-II scanner to identify potential faults.
3
Visually examine the high-voltage battery connections and wiring for signs of damage or wear.
4
Inspect the front motor and drive unit for any signs of overheating or fluid leaks.
5
Evaluate the condition of the brake system, including brake pads and rotors, for signs of excessive wear or heat.

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
•Torque wrench
•Brake pad gauge

Parts Required

•Brake pads (if worn)
•Brake rotors (if warped)
•Replacement wiring or connectors (if damaged)

Related Faults

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Diagnostic Steps

1
Inspect the vehicle for any visible smoke or signs of burning from the battery or electrical components.
2
Check for any diagnostic trouble codes (DTCs) using an OBD-II scanner to identify potential faults.
3
Visually examine the high-voltage battery connections and wiring for signs of damage or wear.
4
Inspect the front motor and drive unit for any signs of overheating or fluid leaks.
5
Evaluate the condition of the brake system, including brake pads and rotors, for signs of excessive wear or heat.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked in a safe, well-ventilated area.
Disconnect the 12V battery for safety.

2. Inspect Electrical Components

Sub-steps:
- Remove any protective covers around the battery and electrical connections.
- Check all wiring harnesses for integrity and look for exposed wires or signs of arcing.
- Use a multimeter to check for continuity in the wiring and ensure connections are secure.

3. Examine Brake System

Sub-steps:
- Remove the wheel covers to access the brake assembly.
- Inspect brake pads for unusual wear; replace if they are worn down to the indicators.
- Check rotors for signs of overheating, such as discoloration or warping; replace if necessary.
- Reassemble the brake components and ensure proper torque specifications are followed.

4. Inspect Drive Unit and Cooling System

Sub-steps:
- Visually check the drive unit for leaks or signs of overheating.
- Verify that the cooling system is functioning properly, ensuring coolant levels are adequate.
- Replace any damaged hoses or components in the cooling system.