why does my Tesla Model 3 Highland (2024-present) make a hissing sound when I accelerate

Solution

1. Preparation

• Gather tools and parts needed for inspection and repair.
• Ensure the vehicle is parked on a level surface and engage the parking brake.
• Disconnect the 12V battery for safety.

2. Inspect Electric Motor

• Sub-steps:
  • Remove the motor cover using a socket set.
  • Visually inspect the motor for any signs of wear, overheating, or physical damage.
  • Check electrical connections for any corrosion or loose fittings.
• Tools Required: Socket set, torque wrench

3. Check High-Voltage Hoses

• Sub-steps:
  • Locate and inspect high-voltage hoses for any cracks, loose fittings, or signs of wear.
  • Tighten any loose connections and replace damaged hoses.
• Tools Required: Wrench set, hose clamps

4. Examine Cooling System

• Sub-steps:
  • Inspect the coolant reservoir and hoses for leaks.
  • Check the operation of the coolant pumps by running the vehicle and monitoring for any abnormal sounds.
  • Replace any faulty components or hoses as necessary.
• Tools Required: Coolant pressure tester, replacement hoses

5. Reassemble and Reconnect

• Sub-steps:
  • Reattach the electric motor cover and secure it with the appropriate torque.
  • Reconnect the 12V battery.
  • Ensure all tools are removed from the engine compartment.
• Tools Required: Torque wrench