Tesla Model 3: ECU - Headlight - Install
Install
- Connect the LH headlight ECU connector, and then position the ECU onto
the headlight.
Note: Position the seal to the headlight ECU, if necessary.
Note: Align the electrical connector to the headlight ECU, and then
close the locking tab while pushing the connector into the headlight ECU.
Note: Make sure that the electrical connector and locking
tab are fully seated.
Note: Press the headlight ECU downward, and then turn it to align
the fastener holes and anti-rotating guides.

- Install the screws that attach the headlight ECU to the LH headlight
assembly.
Torque
2.5 Nm
- Install the LH headlight assembly. See Headlight - LH (Remove and
Replace).
- Install the front fascia. See Fascia - Front (Remove and Install).
- Install the LH front wheel and the RH front wheel. See Wheel (Remove and
Install).
- Install the underhood storage unit. See Underhood Storage Unit (Remove
and Replace).
- Install the hood latch cover. See Cover - Hood Latch (Remove and Replace).
- Install the cabin intake duct. See Duct - Cabin Intake (Remove and
Replace).
- Install the rear underhood apron. See Underhood Apron - Rear (Remove and
Replace).
- If a new headlight ECU has been installed, update the vehicle firmware.
Otherwise, skip to the next step.
- Adjust the headlights. See Headlights - Adjust - NA (Wall Method).
Headlights - Adjust - EMEA (Tool Method)

Adjust Headlights Using a Headlight Tester
This procedure is under development and will be available soon.
READ NEXT:
Adjust Headlights Using a Wall
Apply Tape to Wall
Apply tape to a wall 23.6 in (60 cm) from the ground.
Apply tape to the floor 31.1 ft (9.5 m) from the wall.
Note: EU vehicles require a 1 to
Adjust Headlights Using a Headlight Tester
Park the vehicle on a level surface.
Make sure that all 4 tires are inflated to specification.
Open the front trunk hood.
On the touchscreen, enter h
Adjust Headlights Using a Wall
Position the vehicle for adjusting the headlights. The vehicle should be:
Located in a darkened area.
Parked on a level surface.
Perpendicular to a wall that ha
SEE MORE:
SPECIAL TOOLS
Plug,Car Computer Fluid Port (1119171-00-A)
Kit, Svc Plug, Cooling Hose, Model 3 (1135762-00-A)
Remove
Remove the front subframe assembly. See Subframe Assembly - Front (Dual
Motor) (Remove and Install).
Disconnect the electrical harness from the chiller and EXV assembly hos
Remove
Remove the front LH door closeout panel. See Closeout Panel - Door -
Front - LH (Remove and Install).
Disconnect the electrical harness from the door latch connector.