why does my Tesla Model S Original (2012-2020) make a grinding noise when I accelerate

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

500 words

Problem Statement

Learn how to diagnose and fix grinding noise during acceleration in Tesla Model S (2012-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Brakes

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the high-voltage battery before working on electrical or drivetrain components.
•Allow the vehicle to cool before performing any inspections to avoid burns.

Symptoms

•Grinding noise occurring during acceleration
•Possible vibration felt in the vehicle
•Decreased acceleration performance
•Unusual noises when turning or cornering
•Increased wear on brake components

Diagnostic Steps

1
Perform a visual inspection of the tires for any signs of damage or irregular wear.
2
Check the brake system for any signs of wear, including pads and rotors.
3
Inspect the drivetrain components, including the motor and gearbox, for any visible damage or debris.
4
Use a diagnostic tool to check for error codes related to the drivetrain or brakes.
5
Test drive the vehicle under controlled conditions to replicate the noise and note specific circumstances (speed, load, etc.).

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

•Socket set
•Torque wrench
•Diagnostic tool (OBD-II scanner)
•Brake pad spreader tool

Parts Required

•Brake pads
•Brake rotors
•Drivetrain fluid

Related Faults

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Diagnostic Steps

1
Perform a visual inspection of the tires for any signs of damage or irregular wear.
2
Check the brake system for any signs of wear, including pads and rotors.
3
Inspect the drivetrain components, including the motor and gearbox, for any visible damage or debris.
4
Use a diagnostic tool to check for error codes related to the drivetrain or brakes.
5
Test drive the vehicle under controlled conditions to replicate the noise and note specific circumstances (speed, load, etc.).

Solution

1. Preparation

Ensure the vehicle is parked on a flat surface.
Prepare all necessary tools and replacement parts.
Disconnect the high-voltage battery before working on the vehicle to ensure safety.

2. Inspect and Replace Brake Components (if applicable)

Sub-steps:
1. Remove the wheels using a socket set.
2. Inspect the brake pads and rotors for wear; replace if thickness is below specifications (typically 3mm for pads).
3. If replacement is needed, remove caliper bolts and detach the caliper from the rotor.
4. Replace the old pads with new ones, ensuring they are properly seated.
5. Reinstall the caliper and torque bolts to manufacturer specifications (generally around 30-40 Nm).

3. Inspect Drivetrain Components

Sub-steps:
1. Remove any necessary covers to access the drivetrain.
2. Inspect the electric motor for any signs of damage or noise while spinning the rotor by hand.
3. Check the gearbox for fluid leaks or unusual wear; replace gearbox fluid if necessary.
4. Reassemble any covers and ensure all screws and bolts are tightened to the specified torque.

4. Test Drive

Sub-steps:
1. Reconnect the high-voltage battery.
2. Conduct a test drive to assess whether the grinding noise persists.
3. Monitor for any abnormal sounds or performance issues during the test drive.