why does my Tesla Model S have a knocking sound when I start it

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a flat surface and engage the parking brake.
• Disconnect the high-voltage battery to ensure safety.

2. Inspect Battery Connections

• Reconnect the battery connections securely.
• Check the terminals for corrosion and clean if necessary using a wire brush.
• Ensure that all cables are tightly fastened and there are no loose connections.

3. Examine Motor Mounts and Suspension

• Lift the vehicle using a jack and secure it with jack stands.
• Inspect the motor mounts visually for signs of wear or damage.
• Replace any worn or damaged motor mounts using a socket set and torque to manufacturer specifications.

4. Inspect Drive Components

• Check the drive shafts and related components for any signs of damage or looseness.
• Tighten any loose bolts and replace any damaged components as needed.

5. Reconnect Battery and Test

• Reconnect the high-voltage battery once all inspections and repairs are complete.
• Start the vehicle and listen for the knocking sound.
• If the sound persists, further diagnosis of the motor may be necessary.