Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Software Reinstall (Li-Ion Battery)
2018 Tesla Model 3 BaseSECTION Software Reinstall (Li-Ion Battery)
CAUTION:
Vehicle software version 2023.12 or newer is required in order to perform this procedure.
- 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.
- 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.
- In Toolbox, select the Actions/Autodiag tab, and then search for "redeploy".
- 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.
- Once the reinstallation is complete, check that the release notes appear on the touchscreen, indicating a successful reinstallation.
- Disconnect the LV maintainer from the vehicle. See LV Maintainer (Connect and Disconnect) .
- Disconnect the laptop from the vehicle. See Toolbox 3 (Connect and Disconnect)
- Disable Service Mode. See SERVICE MODE .
- Install the rear underhood apron. See UNDERHOOD APRON - REAR (REMOVE AND REPLACE) .
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.