why is my Tesla Model 3 Original (2017-2023) making a loud humming noise

Tesla Model 3 Highland (2024-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

557 words

Problem Statement

Learn how to diagnose and fix loud humming noise in Tesla Model 3 (2017-2023). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Drivetrain

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the 12V battery before working on electrical components
•Use proper lifting techniques and equipment when raising the vehicle

Symptoms

•Loud humming noise during acceleration or at a constant speed
•Increased cabin noise compared to normal operation
•Possible vibrations felt in the floor or seats
•No warning lights or error codes on the dashboard
•Noise may vary with speed or power demand

Diagnostic Steps

1
Visual inspection for any visible signs of damage or wear around the electric motor, drivetrain, and suspension components
2
Drive the vehicle at various speeds to determine if the noise changes with speed or load
3
Use an OBD-II scanner to check if there are any stored error codes related to the drivetrain or electric motor
4
Check the wheel bearings for wear or damage, as they can produce humming noises if failing
5
Drive the vehicle in a neutral position to see if the noise persists, which can help isolate the source
6
Inspect tires for uneven wear or damage that might contribute to noise

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
•Socket set
•Jack and jack stands
•Bearing puller
•Torque wrench

Parts Required

•Replacement wheel bearings (if applicable)
•Electric motor mounts (if applicable)

Related Faults

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Diagnostic Steps

1
Visual inspection for any visible signs of damage or wear around the electric motor, drivetrain, and suspension components
2
Drive the vehicle at various speeds to determine if the noise changes with speed or load
3
Use an OBD-II scanner to check if there are any stored error codes related to the drivetrain or electric motor
4
Check the wheel bearings for wear or damage, as they can produce humming noises if failing
5
Drive the vehicle in a neutral position to see if the noise persists, which can help isolate the source
6
Inspect tires for uneven wear or damage that might contribute to noise

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a flat surface and set the parking brake.
Disconnect the 12V battery for safety.

2. Inspect and Replace Wheel Bearings (if needed)

Remove the Wheel:
- Use a jack to lift the vehicle and secure it with jack stands.
- Remove the lug nuts with a socket set and take off the wheel.
Inspect Wheel Bearings:
- Spin the hub by hand; listen for roughness or grinding.
- Check for play in the wheel by rocking it back and forth.
Replace Wheel Bearings (if necessary):
- Remove the brake caliper and rotor.
- Use a bearing puller to extract the old bearings.
- Install new bearings, ensuring they are properly seated.
- Reassemble the brake rotor and caliper, and reattach the wheel.

3. Inspect Electric Motor and Drivetrain

Remove the Underbody Shield:
- Unscrew and remove the underbody shield to access the electric motor.
Check Electric Motor Mounts:
- Inspect the motor mounts for wear or failure.
- Replace mounts if they show signs of excessive wear or damage.
Inspect Drivetrain Components:
- Look for any signs of oil leaks or physical damage to the drivetrain.
- Tighten any loose bolts or components as necessary.