my Tesla Model 3 Highland (2024-present) has a burning smell when driving what should I check

Tesla Model 3 Highland (2024-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

521 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 your Tesla Model 3 Highland. 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

•Allow the vehicle to cool before inspecting the brake system or battery compartment.
•Disconnect power if working on electrical components to avoid shock hazards.

Symptoms

•Burning smell inside or outside the vehicle
•Overheating warning on the dashboard
•Reduced power or sluggish acceleration
•Unusual noises from the electric motor or battery area
•Smoke visible from under the car or near the wheel wells

Diagnostic Steps

1
Inspect for visible signs of smoke or burning from the undercarriage or wheel wells.
2
Check the battery and motor temperature using the vehicle's diagnostic menu.
3
Scan for error codes using the Tesla mobile app or service interface.
4
Examine the brake system for signs of overheating, such as discoloration of brake components or excessive heat.
5
Assess the condition of the electrical wiring and connectors in the battery compartment for damage or corrosion.

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

•Tesla service tools or mobile app for diagnostics
•Flashlight
•Lug wrench
•Brake cleaner

Parts Required

•Brake pads (if worn)
•Brake rotors (if damaged)
•Electrical connectors (if damaged)

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Diagnostic Steps

1
Inspect for visible signs of smoke or burning from the undercarriage or wheel wells.
2
Check the battery and motor temperature using the vehicle's diagnostic menu.
3
Scan for error codes using the Tesla mobile app or service interface.
4
Examine the brake system for signs of overheating, such as discoloration of brake components or excessive heat.
5
Assess the condition of the electrical wiring and connectors in the battery compartment for damage or corrosion.

Solution

1. Preparation

Tools Required: Tesla service tools or mobile app for diagnostics, flashlight
Ensure the vehicle is parked on a level surface and turned off.
Wear safety gloves and goggles for protection.

2. Inspect and Clean Brake Components

Sub-steps:
1. Remove the wheel cover using a lug wrench.
2. Inspect the brake pads and rotors for excessive wear or overheating.
3. If any components are discolored or burnt, replace the brake pads and/or rotors.
4. Clean the brake components using brake cleaner and a soft brush.
5. Reassemble the wheel cover and tighten lug nuts to manufacturer specifications (usually around 80-100 ft-lbs).

3. Check Electrical Connections

Sub-steps:
1. Open the front trunk (frunk) and locate the battery compartment.
2. Inspect all wiring and connectors for signs of damage, such as fraying or melting.
3. If any connections appear burnt or corroded, repair or replace as necessary.
4. Reseal any connections with dielectric grease to prevent moisture ingress.

4. Monitor Battery Temperature

Sub-steps:
1. Access the vehicle's diagnostic system using the Tesla app.
2. Check battery temperature readings; if above normal (typically above 90°C), investigate further.
3. If overheating is detected, reduce load on the vehicle and consult Tesla service.