Replacing the high-voltage (HV) battery in a Model 3 is a complex process. Here’s an overview of what you need to know:

When to Replace the Battery

• Decreased Range: Noticeable drop in driving range.

• Battery Health: Significant degradation in battery health as indicated by diagnostics.

• Error Messages: Persistent battery-related warning messages.

Battery Replacement Process

1. Diagnosis: A thorough diagnostic check to confirm the need for replacement.

2. Preparation: Disconnecting the vehicle from any power source and ensuring safety protocols are followed.

3. Removal:

   • Lift the car and remove the under-body panels.

   • Disconnect the battery connectors and remove mounting bolts.

   • Carefully extract the battery pack from the vehicle.

4. Installation:

   • Place the new or refurbished battery pack in position.

   • Reconnect the battery connectors and secure the pack with bolts.

   • Replace under body panels.

5. cooling system vacuum refill

6. Firmware Update and/or Reinstall

7. Level 2 Charging of the HV Battery

8. Testing: Reconnect the vehicle, perform a systems check, and test drive to ensure everything is functioning correctly.

Cost

The cost can vary widely based on whether you opt for a new or refurbished battery. Typically, it can range from a few thousand dollars upwards.

 

CONTACT US, when/if your Model 3 HV battery requires replacement.