Headlight Unit (Headlamp Assembly)
The headlight unit is the complete front lamp assembly, including housing, lens, reflector or projector, bulbs or LEDs and adjustment motors.
What is Headlight Unit (Headlamp Assembly)?
Modern LED units are often sealed and replaced as one part. Older units allow bulb replacement from the back of the housing. Some include daytime running lights and indicators. Yellowed plastic lenses can often be restored by polishing and sealing instead of replacing the unit.
How it works
A reflector or projector shapes the light into a beam pattern that lights the road without dazzling others.
Why it matters for your car
Replacement units can be very expensive, so check whether a part can be repaired first. After fitting a new unit, the beam must be aimed correctly.
Other terms
- Active Bonnet (Pedestrian Protection)
- Bonnet (Hood)
- Booster Seat (Child Booster)
- Brake Caliper Rebuild
- Charging Port (Charge Inlet)
- Coolant Level Sensor
- Drag Coefficient (Cd)
- Dual Action Polisher
- Emergency Lane Keeping
- Engine Balance (Primary And Secondary)
- Feeler Gauge
- Firing Order
- Low Range (Reduction Gear)
- Naturally Aspirated Engine
- Paint Protection Film (PPF)
- Part-Worn Tyre
- Starter Motor
- Timing Chain
- Tyre Puncture Repair (Plug And Patch)
- Waterless Wash