Correction code 21153202 (HW3) 21153302 (HW4) FRT 0.78 0.66 NOTE: Unless otherwise explicitly stated in the procedure, the above correction code and FRT reflect all of the work required to perform this procedure, including the linked procedures. Do not stack correction codes unless explicitly told to do so. NOTE: See Flat Rate Times to learn more about FRTs and how they are created. To provide feedback on FRT values, email LaborTimeFeedback@tesla.com. NOTE: See Personal Protection to make sure wearing proper PPE when performing the below procedure.

1. Open the LH front door and lower all windows.
2. Connect a laptop with Toolbox 3 to the vehicle. See Toolbox 3 (Connect and Disconnect).
3. Perform the Toolbox Owner Authorization Request.
   
   1. Log in to https://toolbox.tesla.com/help/owner_authorization.
   2. On the left panel, click Owner Authorization Request, and then click Request Owner Authorization in the main panel.
   3. Complete and submit the form.
   4. Ask the vehicle owner to approve the authorization request that was sent to their email.
4. Click on Dashboards > Car Computer Replacement and on the "Getting Started" page, click on Next Step.
5. On the "Backup & Factory Reset" page, click Next Step and follow the prompts to perform a profile backup and factory reset on the car computer.
   Note

   The car computer will reboot several times during this step.
   
6. Once the "Replace" page appears, the car computer can be replaced. Use the instructions in the appropriate "Remove and Install" procedure to replace the car computer:
   Select the appropriate Car Computer (Remove and Install) procedure:

   • Car Computer (HW3) (Remove and Install)
   • Car Computer (HW4) (Remove and Install)
   Perform the following tasks that are described in the (Remove and Install) procedure:

   1. Remove the current car computer.
   2. Fasten the replacement car computer to the vehicle and connect all harnesses and hoses to the computer.
   3. Prepare the vehicle for a Coolant Air Purge.
   4. Reconnect LV power. See LV Power (Disconnect and Connect).
   5. Connect an LV maintainer to the vehicle, but do not disconnect the LV battery. See LV Maintainer (Connect and Disconnect).
   6. Unlock the vehicle gateway.
   7. Start the Coolant Air Purge routine.
7. Reestablish the Toolbox laptop connection, and in the "Replace" page, click Next Step to go to the "Associate" page.
   
8. Follow the prompts to transfer configs and associate the replacement car computer. The car computer will reboot several times.
9. When association is complete and the VIN is confirmed online, click Next Step to go to the "Update" page.
   Note

   If necessary, Reconnect the Toolbox connection.
   
10. Click Start Part Replacement OTA to deploy a software update to the vehicle.
    Note

    If necessary, Reconnect the Toolbox connection.
    
11. Re-install software via UI
    Note

    Via Controls > Service Mode > Software Reinstall
12. In Toolbox, click Next Page to go to the "Restore" page, and then follow the prompts to restore the vehicle profile.
    
13. Disconnect the laptop from the vehicle.
14. Install the remaining components that were removed for access.
    Select the appropriate Car Computer (Remove and Install) procedure:

    • Car Computer (HW3) (Remove and Install)
    • Car Computer (HW4) (Remove and Install)
15. Make sure to properly dispose of the old car computer. Follow the instructions in Car Computer (Dispose) and add correction code 21151007 as a separate activity to the Service Visit.