why does my Tesla Model S Plaid/Refresh (2021-present) make a rattling noise when idling

Solution

1. Preparation

• Tools Required: Mechanic's stethoscope, socket set, inspection mirror, OBD-II scanner.
• Ensure the vehicle is parked on a flat surface and turned off.
• Disconnect the high voltage battery for safety before starting any work.

2. Inspecting Loose Components

• Sub-steps:
  • Remove the engine cover by unscrewing or unclipping as necessary.
  • Carefully check for any loose bolts or nuts around engine mounts and heat shields.
  • Tighten any loose fasteners to the manufacturer's torque specifications.

3. Addressing Heat Shields

• Sub-steps:
  • Locate the heat shields around the exhaust and undercarriage.
  • If any are loose, remove the affected shield by unscrewing the fasteners.
  • Inspect for damage; if damaged, replace with new heat shield or secure it properly.

4. Assessing Battery Cooling System

• Sub-steps:
  • Inspect the battery cooling fan for debris or damage.
  • Clean any obstructions with compressed air.
  • Test the fan operation by turning on the vehicle and checking for any unusual noise from the fan.

5. Reassemble and Test

• Sub-steps:
  • Reinstall the engine cover and any removed components.
  • Reconnect the high voltage battery.
  • Start the vehicle and observe if the rattling noise persists while idling.