How to adjust your head lights for '05+ xterras.
Before performing aiming adjustment, make sure of the following:
Keep all tires inflated to correct pressure.
Place vehicle on level ground.
See that vehicle is unloaded (except for full-levels of coolant, engine oil and fuel, spare tire, jack and tools). Have the driver or equivalent weight placed in the driver seat.
Position vehicle 25 feet (7.6M) from a wall or something similar.
Low Beam and High Beam
Note: By regulation, no means for horizontal aim adjustment is provided from the factory, only vertical aim is adjustable.
Turn headlamp low beam on.
Use adjustment screw to perform aiming adjustment.
(Adjustment screw is located next to the top bracket closest to the fender on each side).
Cover the opposite lamp and ensure fog lamps, if equipped, are turned off.
Caution: DO NOT tighten adjustment screw beyond a torque of 1.67Nm (17kg-cm, 14.8 in-lb) or damage may occur.
Adjust beam pattern until cut off line (top edge of illumination area) is positioned at same height off ground as bulb center (on H-line). Measure cut-off line within distance A on H-line.
If vehicle front body has been reparied and/or the headlamp assembly has been replaced, check aiming. Use the aiming chart shown below.
Basic illuminating area for adjustment should be within range shown on the aiming chart. Adjust headlamps accordingly.
Adjustment screws diagram.