my Tesla Model S Original (2012-2020) has a persistent humming noise, what could it be?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

3-6 hours

Time

medium

Difficulty

medium

Severity

4 min read

604 words

Problem Statement

Learn how to diagnose and fix a persistent humming noise in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Drivetrain

Estimated Time

3-6 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Ensure the vehicle is securely supported on jack stands before working underneath.

Symptoms

•Humming noise present during acceleration and deceleration
•Noise varies with vehicle speed
•Increased vibration felt through the steering wheel or chassis
•Possible decrease in fuel efficiency
•Unusual tire wear observed

Diagnostic Steps

1
Inspect Tires: Check for uneven wear patterns and proper inflation.
2
Scan for Error Codes: Use an OBD-II scanner to check for any error codes related to the drivetrain or electric motor.
3
Visual Inspection of Drivetrain: Examine the driveshaft, motor mounts, and components for any visible damage or wear.
4
Check Wheel Bearings: Lift the vehicle and spin each wheel to listen for noise or feel for roughness.
5
Test Drive: Perform a test drive to determine if the noise changes with speed and under different driving conditions.
6
Inspect Brake Components: Check brake pads and rotors for any defects 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
•Tread depth gauge
•Air compressor
•Tire iron
•Jack
•Socket set
•Torque wrench
•Wheel bearing puller
•Brake pad spreader

Parts Required

•New tires (if necessary)
•Wheel bearings (if necessary)
•Brake pads and rotors (if necessary)

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Diagnostic Steps

1
Inspect Tires: Check for uneven wear patterns and proper inflation.
2
Scan for Error Codes: Use an OBD-II scanner to check for any error codes related to the drivetrain or electric motor.
3
Visual Inspection of Drivetrain: Examine the driveshaft, motor mounts, and components for any visible damage or wear.
4
Check Wheel Bearings: Lift the vehicle and spin each wheel to listen for noise or feel for roughness.
5
Test Drive: Perform a test drive to determine if the noise changes with speed and under different driving conditions.
6
Inspect Brake Components: Check brake pads and rotors for any defects that might contribute to noise.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and set to "Jack Mode" to prevent unexpected movement.
Disconnect the negative battery terminal for safety.

2. Tire Inspection and Replacement

Sub-steps:
1. Remove the hubcaps (if applicable) using a flathead screwdriver.
2. Inspect tire tread depth using a tread depth gauge; replace if worn unevenly.
3. Check tire pressure and inflate to recommended PSI.
4. If tires are damaged or worn, replace with new tires of the same specifications.
Tools Required: Tread depth gauge, air compressor, tire iron, jack.

3. Drivetrain Inspection and Repair

Sub-steps:
1. Remove the underbody panel (if applicable) to access the drivetrain.
2. Inspect the driveshaft for any play or damage; replace if necessary.
3. Check motor mounts for wear; replace if cracked or damaged.
4. Reinstall the underbody panel securely.
Tools Required: Socket set, torque wrench, pry bar.

4. Wheel Bearing Replacement (if needed)

Sub-steps:
1. Remove the wheel using a tire iron and jack the vehicle securely.
2. Remove the brake caliper and rotor for access to the wheel bearing.
3. Use a bearing puller to extract the old wheel bearing.
4. Install the new wheel bearing and reassemble the brake components.
Tools Required: Wheel bearing puller, socket set, torque wrench.

5. Brake Inspection and Replacement (if needed)

Sub-steps:
1. Inspect brake pads for wear; replace if thickness is below specifications.
2. Check rotors for warping or scoring; resurface or replace if necessary.
3. Reassemble the brake components ensuring proper torque specifications are met.
Tools Required: Torque wrench, brake pad spreader.