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HOMESERVICE MANUALSTESLA2018MODEL 3 BASEREPAIR AND DIAGNOSISMAINTENANCEPROCEDURESMAINTENANCE, INSPECTION AND SERVICE -- MODEL 3FIRMWARE SERVICESOFTWARE REINSTALL - TOUCHSCREENSOFTWARE REINSTALL (LEAD ACID BATTERY)
2018 Tesla Model 3 Base

Software Reinstall (Lead Acid Battery)

2018 Tesla Model 3 BaseSECTION Software Reinstall (Lead Acid Battery)
  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) .
RENDER: 1.0x

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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.