Hi everyone. i have a b.m.w X5 2004 with xenon headlights ....had an accident and had to change both lights........ after changing the right lights goes on but the left doesnt so i tried switching them and the problem still the same on the same side ........but if i take off the right side switch and put it again the left light goes on......................but after i turn of the lights for several minutes and try to try again the problem comes back...............................anybody had a similar problem???????????????????????????

SOURCE: hi. i need to replace xenon headlight bulb.

you have to unplug the ballast.then remove the outer cover,then move the spring clip that holds the bulb.do not touch the bulb with fingers.
install bulb,then clip in,then put cover and ballast.

SOURCE: xenon headlight problems

there are 3 things that make the xenon in your car work the bulb, an ignitor, and a control module, you know your bulbs are ok so thats good, now you will want to swap the control modules they are a metal box attached to the headlight assembly its roughly 4"x4" you will remove the hheadlight assemblys to get to the module, there are 4 8mm bolts and then it pulls out, it the light follows the control module then thats what you will need if not you will need an ignigtor, as far as the flickering that is moet likely the module going bad, the company that makes this system is AL (automotive lighting) there is an SIB from BMW about this that says under a warr claim both control modules are to be replaced and the bulb of the faulty headlight, however i cant count the number of times i have done all that and still have to replace the ignigtor, If it is the Ign that is alot harder to swap as you have to dis assembly the entire light assembly

SOURCE: Right side xenon headlight sometimes will not turn on

the headlight needs a xenon control unit it is located on the head light on the back or bottom of it
thanks
andrew