Tesla Model 3 Owners & Service Manuals

Tesla Model 3: Vent Assembly - HV Battery - RH (Remove and Replace)

Tesla Model 3 2017-2025 Service Manual / Battery System / HV Battery Enclosure / Vent Assembly - HV Battery - RH (Remove and Replace)

Remove

  1. Use Toolbox to put the vehicle into Factory Mode.
  2. Invoke diagnostics on the touchscreen.
  3. Inspect the Notifications for either a BMS_a123 or a BMS_W123 alert.
  4. If:
  • Either alert is present - Contact Service Engineering. Do not perform this procedure.
  • Neither alert is present - Continue to the next step.
  1. Exit diagnostics and restart the touchscreen.
  2. Use Toolbox to exit Factory Mode.
  3. Disconnect 12V power. See 12V Power (Disconnect and Connect).
  4. Perform the vehicle electrical isolation procedure. See Vehicle Electrical Isolation Procedure.
  5. Remove the mid aero shield panel. See Panel - Aero Shield - Mid (Remove and Replace).

Vent Assembly - HV Battery - RH (Remove and Replace)

  1. Release the fir tree clips that attach the coolant hoses to the RH shear plate.
  2. Put on personal protective equipment.

Warning: HV insulating gloves and leather glove protectors must be worn when exposed to the interior of the HV battery.

Vent Assembly - HV Battery - RH (Remove and Replace)

  1. Remove the nuts (x5) that attach the RH vent assembly to the HV battery, and then remove the vent assembly from the battery.

Install

  1. Put on personal protective equipment

Warning: HV insulating gloves and leather glove protectors must be worn when exposed to the interior of the HV battery.

Vent Assembly - HV Battery - RH (Remove and Replace)

  1. Install the RH vent assembly to the HV battery, and then install the nuts (x5) that attach the vent assembly to the battery. Torque 10 Nm
  2. Perform an HV battery air leak test. See HV Battery Air Leak Test.
  3. If the new vent assembly does not have a breather valve preinstalled, install one now. See Breathers - HV Battery (Remove and Replace).

Vent Assembly - HV Battery - RH (Remove and Replace)

  1. Fasten the fir tree clips that attach the coolant hoses to the RH shear plate.
  2. Install the mid aero shield panel. See Panel - Aero Shield - Mid (Remove and Replace).
  3. Connect 12V power. See 12V Power (Disconnect and Connect).

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     Penthouse Coolant- Refill

    Perform a penthouse coolant leak test. See Penthouse Coolant Leak Test. Remove the plugs from the hoses. Connect the rear powertrain supply hose to the RH side of the HV battery, and the rear drive unit inverter inlet hose to the LH side of the HV battery. Move the coolant drain to under the

     Door - Rear - LH (Remove)

    Remove Open the rear LH door, and fully lower the window. Pass a shop towel halfway through the striker, and close the door so that it rests against the shop towel. Open the front LH door. Release the clips (x4) of the rear LH door electrical harness seal at the B-pillar, and pull

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