Question about 2003 BMW 330
Sounds like the power ballast is failing - that's what takes the 12v signal from the car and amplifies it up to a level sufficient for driving the xenon bulb. Swap the ballasts between the headlights (they're easy to dismount) and see if the flicker goes to the other side (swap only the ballasts - leave the bulbs in their existing positions). If the flicker moves to the other side, the ballast is the problem. If it stays on the left side, the bulb needs replacement.
Search online for the bulbs - the dealer will kill you on pricing (the Audi dealership wants $200 each for my A4's xenon bulbs, but I can find them online for about $30 per pair (or less)). You'd want to order a D2S style bulb for an OEM BMW fitment, in 4300k color temperature.
Posted on Nov 17, 2009
My A4 Audi lights on low beam has a shadow and doesn't shine as far as they do on high beam. Took it to mechanic and he said that is the way they are suppose to work which I don't believe that. Should be an adjustment or sensor etc that needs fixed. Anyone with this problem or know anything I would appreciate it. Cath
Posted on Sep 02, 2011
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Posted on Jan 02, 2017
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