A high-intensity discharge, or HID, headlight provides a stronger beam of light than a conventional headlight but can burn out just like any other headlight. When this happens, it should be replaced as soon as possible to avoid dangerous driving conditions or a costly traffic ticket. The replacement of an HID headlight is similar to that of a standard bulb except for having to deal with a ballast.
Park your vehicle on level ground. Turn off the engine and let the vehicle sit for 10 minutes to allow the headlight bulb to cool.
Open the hood and inspect the area behind the burned-out headlight to determine how you will access the HID bulb. Some vehicles will have a plastic or rubber access panel that has to be removed; others will have open access.
Unplug the electrical wiring harness from the current HID ballast. Unplug the wire that runs from the ballast to the light socket.
Remove the socket and undo retaining clips that hold the HID bulb in place. Insert the new HID bulb and secure it in place.
Replace the socket in the light assembly. Plug the wire from the ballast into the socket and the wiring harness into the ballast. Replace access panels and close the hood.
