2018 Tesla Model 3 BaseFACTORY OEM SERVICE PROCEDURE

Software Reinstall (Li-Ion Battery)

CAUTION: Vehicle software version 2023.12 or newer is required in order to perform this procedure.
  1. Connect the LV maintainer to the vehicle, but do not disconnect the LV battery. See LV Maintainer (Connect and Disconnect) .
    NOTE: It is OK for the LV maintainer and LV battery to both be connected while performing this procedure.
  2. Connect a laptop with Toolbox 3 to the vehicle. See Toolbox 3 (Connect and Disconnect) 
    NOTE: Locally connecting the vehicle to Toolbox 3 will automatically enable Service Mode Plus.
  3. In Toolbox, select the Actions/Autodiag  tab, and then search for "redeploy".
  4. Run the appropriate routine and wait for the reinstallation to complete. Reinstallation status can be monitored on the vehicle touchscreen.
    • Service CAN Redeploy (UPDATE_CAN-REDEPLOY) -  A "partial" software reinstallation that reinstalls the currently installed software package to all module, ECU, and component replacements, with the exception of the car computer.
    • Service Redeploy (UPDATE_SERVICE-REDEPLOY) -  A "full" software reinstallation that reinstalls the currently installed software package to the car computer, and all module, ECU, and component replacements.
  5. Once the reinstallation is complete, check that the release notes appear on the touchscreen, indicating a successful reinstallation.
  6. Disconnect the LV maintainer from the vehicle. See LV Maintainer (Connect and Disconnect) .
  7. Disconnect the laptop from the vehicle. See Toolbox 3 (Connect and Disconnect) 
  8. Disable Service Mode. See SERVICE MODE .
  9. Install the rear underhood apron. See UNDERHOOD APRON - REAR (REMOVE AND REPLACE) .
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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