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:
HV
Battery (Dual Motor) - Remove
SPECIAL TOOLSAdapter, Lift Pad, Model 3 (1453419-00-A)Key, Seat Belt Release, Model 3 (1133787-00-A)
ASY, Battery Table, Manual Lift (1020566-00-F)Top Plate, Battery Table, Manual Lift (1020566-99-A)
Hoist, H-Frame EMEA (1129166-00-A)Kit, Alignment
DRAFT
Warning:
This procedure was derived from pre-production computer models, and
might not reflect the real-world situation. Warnings and cautions might be
missing. Follow safety requirements and use extreme caution when working on or
near high voltage systems and components
Procedure
Use To