my Tesla Model 3 Original (2017-2023) has a weird smell when accelerating

Tesla Model 3 Highland (2024-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

627 words

Problem Statement

Learn how to diagnose and fix the weird smell when accelerating in Tesla Model 3 (2017-2023). 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 12V battery before working on electrical systems.
•Ensure the vehicle is securely lifted and supported when working underneath.

Symptoms

•Unpleasant odor when accelerating
•Possible loss of power during acceleration
•Increased cabin noise
•Unusual sounds from the drivetrain
•Occasional warning lights on the dashboard

Diagnostic Steps

1
Inspect for leaks under the vehicle for any fluid leaks that could be contributing to the smell.
2
Check cabin air filter and replace if necessary to ensure it is not causing the odor.
3
Scan for error codes using an OBD-II scanner to check for any diagnostic trouble codes (DTCs).
4
Inspect the battery cooling system for clogs or coolant leaks that could be causing overheating and odors.
5
Evaluate the electric motor and drivetrain for signs of wear, burning, or overheating.
6
Check brake components for excessive wear or overheating that can produce a burning smell.

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
•Flathead screwdriver
•Ratchet set
•Torque wrench
•Inspection mirror
•Socket set
•Jack
•Jack stands

Parts Required

•Cabin air filter
•Replacement brake pads (if necessary)
•Any damaged drivetrain components (if necessary)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Inspect for leaks under the vehicle for any fluid leaks that could be contributing to the smell.
2
Check cabin air filter and replace if necessary to ensure it is not causing the odor.
3
Scan for error codes using an OBD-II scanner to check for any diagnostic trouble codes (DTCs).
4
Inspect the battery cooling system for clogs or coolant leaks that could be causing overheating and odors.
5
Evaluate the electric motor and drivetrain for signs of wear, burning, or overheating.
6
Check brake components for excessive wear or overheating that can produce a burning smell.

Solution

1. Preparation

Gather all necessary tools and parts.
Park the vehicle on a level surface and engage the parking brake.
Disconnect the 12V battery to prevent accidental electrical shorts.

2. Check and Replace Cabin Air Filter

Tools Required: Flathead screwdriver, new cabin air filter.
Remove the glove compartment by unscrewing the screws with a flathead screwdriver.
Detach the old cabin air filter from its housing.
Install the new cabin air filter, ensuring it is seated correctly.
Reassemble the glove compartment.

3. Inspect and Clean Battery Cooling System

Tools Required: Ratchet set, torque wrench, cleaning supplies.
Remove the access cover to the battery cooling system by unscrewing the retaining bolts.
Inspect the cooling ducts for blockages or debris.
Clean any accumulated debris and ensure proper airflow.
Reassemble the cover, tightening bolts to the manufacturer's torque specifications.

4. Inspect Electric Motor and Drivetrain

Tools Required: Socket set, inspection mirror.
Lift the vehicle using a jack and secure it with jack stands.
Inspect the electric motor for signs of damage or overheating.
Check the drivetrain components for any worn or damaged parts.
Replace any faulty components as needed.

5. Brake Components Inspection

Tools Required: Jack, jack stands, socket set.
Remove the wheel to access the brake assembly.
Inspect the brake pads for excessive wear or glazing.
Replace worn brake pads and rotors if necessary.
Reinstall the wheel and lower the vehicle.