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Software Reinstall (Lead Acid Battery)

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2023 Tesla Model 3, 2022 Tesla Model 3, 2021 Tesla Model 3, 2020 Tesla Model 3, and 2019 Tesla Model 3. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the rear underhood apron. See Underhood Apron - Rear (Remove And Replace) .
  2. Connect an LV battery maintainer to make sure power is not lost during the software reinstall.
    CAUTION: If using a 50A or 80A maintainer, make sure the maintainer is set to "Lead Acid" or "Half Power" mode. Failure to do so could damage the LV battery.
    G00643657Courtesy of TESLA, INC.
  3. Enable Service Mode. See Service Mode .
  4. Go to the Service Mode menu: touch the Service Mode "wrench" icon at the bottom of the vehicle touchscreen.
    NOTE: Alternatively, for vehicles with older firmware versions: Touch Controls  (vehicle icon), and then touch Service Mode  .
  5. On the vehicle touchscreen, touch Software Reinstall > Reinstall  .
  6. Once the reinstallation is complete, check that the release notes appear on the touchscreen, indicating a successful reinstallation.
  7. Disconnect the LV maintainer.
    G00643657Courtesy of TESLA, INC.
  8. Disable Service Mode. See SERVICE MODE .
  9. Install the rear underhood apron. See Underhood Apron - Rear (Remove And Replace) .
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