The VW polo has headlight bulbs. If the headlights are not working, it may be a bulb has burnt out.
I what car? Year, Make, Model. All will have individual bulbs for the different functions, some are indeed located in the same housing.
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Watts
my peugeot 306 has a twin headlight on drivers side and a single unit on passenger is that normal
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watts
you have to remove the panel which is situated in front of the front wheel, inside the wheel arch, this will give you access to the lower bulb. I found it easier to take the headlight unit out completely and replace the bulbs on the bench.To remove the unit you undo the two screws on the top of the light and loosen the screw through the panel in the wheel arch and the headlight will slide forward and out.
The head light is a sealed unit. The outer sense is not removable.
Front indicator bulbs - remove the complete headlight unit - see 'related answers' for this. Rear indicator bulbs - unfasten the rear light unit which is held in by a big plastic wing-nut on the inside. Lift the hatch and reach in behind the light unit. You will feel a hole in the trim and inside it a plastic wing-nut. Unscrew that and the rear light unit will come loose but will still be retained by two plastic pegs, top and bottom, on the outside. Get a firm grip of the light unit with both hands and give a sharp tug to release the plastic pegs. The light unit will now hang on its wiring. Bulb holders are twist-and-turn.
there is a locking bar to side of headlight has a hook end, press down and pull, this will release headlight, also it ie held in with one plastic turn screw at rear of headlight,
This unit features and requires LED as a light source.
See "Replacing Bulbs" on page 50 of Chapter 11 "Maintenance and Service" in your "OWNER'S MANUAL"..... See the Sources and Related Links section below for light bulb information.