Change Headlight Units
You must not drive with headlight units in poor condition (broken mounting or lens, clouded lens, oxidised reflector). A lighting fault is an MOT failure and, if you are stopped, can result in a fixed penalty notice (typically £100) and possibly the vehicle being taken off the road.
Repair or replace?
Before replacing a complete headlight unit, weigh up whether it can be repaired. Manufacturers often offer repair kits for broken mounting tabs. A scratched or hazed lens can be restored by sanding, polishing and a suitable lacquer.
Replacing a headlight unit yourself
Difficulty 2/5
Removal is not difficult but can be lengthy if it means taking off the bumper (front headlight). Tools: usually a 10 mm spanner.
Alignment essential
After refitting a front headlight unit, a beam setting using a headlamp aligner is essential so the beam points correctly without dazzling other road users.
Method
Disconnect the battery, remove the front bumper if necessary, undo the mounting screws, pull out the headlight unit, disconnect the connectors, refit in reverse order.
Price
Front halogen unit: from around £150 to £500 depending on the model. Front LED unit: up to £1,000 or more. Rear light cluster: £80 to £300.
Example: removing and refitting a front headlight unit
