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

- Release the fir tree clips that attach the coolant hoses to the LH shear
plate.
- 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.

- Remove the nuts (x5) that attach the LH vent assembly to the HV battery,
and then remove the vent assembly from the battery.
Vent Assembly - HV Battery - LH- Install
Install
- 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.

- Install the LH vent assembly to the HV battery, and then install the
nuts (x5) that attach the vent assembly to the battery.
Torque 10 Nm
- Perform an HV battery air leak test. See
HV Battery Air Leak Test.
- If the replacement vent assembly is without a breather valve, install
one now. See
Breathers - HV Battery (Remove and Replace).

- Fasten the fir tree clips that attach the coolant hoses to the LH shear
plate.
- Install the mid aero shield panel. See
Panel - Aero Shield - Mid (Remove and Replace).
- Connect 12V power. See
12V Power (Disconnect and Connect).
READ NEXT:
Remove
Use Toolbox to put the vehicle into Factory Mode.
Invoke diagnostics on the touchscreen.
Inspect the Notifications for either a BMS_a123 or a BMS_W123 alert.
If:
Either alert is present
SPECIAL TOOLS
Drive Unit Pressure Test Fixture (1053600-00-B)
Adapter, Coolant Reservoir Pressure Test (1130942-00-B)
Kit, Coolant Leak Test Adapters, Model 3 (1132185-00-B)
Kit, Coolant Drain &
SEE MORE:
Remove
Remove the LH front door trim panel. See Panel - Door Trim - Front - LH
(Remove and Install).
Remove the LH front door inner belt seal. See Seal - Inner Belt - Front
Door - LH (Remove and Replace).
Remove the front LH door glass. See Glass - Door - LH - Front (Remove
and Replace)
Headlight - LH- Remove
It is recommended that the vehicle be powered down before executing headlight
replacement to ensure that the new headlights are recognized during vehicle
firmware update.
Remove
Raise and support the vehicle. See Raise Vehicle - 2 Post Lift.
Remove the rear underhood ap