How to chngae
SOURCE: burned out headlight/bulb bmw 1991 325i 2dr
It's a bulb replacement. If it's anything similar to my Audi, there is a cover on the back of the headlight housing that you pop off. Then you can reach in, pull the wire connector off the bulb, and unclip a metal retainer over the bulb, and pull the bulb out. Installation of the new one is the reverse. Just be SURE not to touch the glass part of the bulb. Skin oils can cause a halogen bulb to burn very hot and burn out very quickly. If you do touch the glass, wipe it gently but thoroughly on a cotton cloth to clean it off before you install it.
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: My son's 2002 BMW 745LI, Zenon type, left side,
well can be one of the 3 components in the zenon lights system, the first thing to check is the bulb, be careful dont touch it with bare hands , second thing is the Burner electronic Item and the last thing is the Module ( electronic ) your best option is to take it to any bmw authorize delaer , i had the same problems and was the module, the previous owner use to wash the engine and water got inside de module , i replace the module , the burner the bulbs ( 4 of them ) at a 950.00 cost from dealer., is not cheap, dont buy zenon buls at regular autoparts are not BMW factory item the durabily and the light system is made with cheap and low quality materials. if you have a Bimmer keep it right !
SOURCE: driver side headlight is dead.
replace bulb first try to take out passenger side bulb and test it on the drivers side to c if it is the bulb
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