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Old 10-05-2010, 12:20 PM   #1
Registered User
Join Date: Jun 2009
Location: Colorado
Posts: 207
My Ride: 03 330xi
330xi HID issues

I originally posted in the lighting forum but thought someone in here might be able to help.

As the title suggests, I am having an issue with my HID headlamps (low beams) on my 2003 (build 11/2002) 330xi. My car has 83k on it. I have searched around the threads and seen some similar issues but nothing that documents exactly what is happening.

I was getting a flicker in my left (DS) low beam light. I swapped bulbs and the problem migrated to the PS. I replaced both the D2S bulbs with 2 new ones from one of the E46 sponsors (cheap with Japanese lettering but 35watt D2S just the same). The old ones I pulled out looked as if the DS was a replacement of some kind (I have already thrown it out) while the PS looks like original BMW.

Since then:

This worked fine for like a week. Then the flicker came back on the passenger side and got progressively worse over the course of 3 days until the bulb just shut down after being on for about 5 minutes or so and triggered a dash light. I called BMW for input and they said that aftermarket bulbs may have a slightly different amperage than BMW bulbs. I took this as bull but this past weekend I put the old bulb back in the PS and left a new bulb in the DS. The problem migrated back to the DS although the flicker is not that bad…yet? I also changed both the fuses as well.

Yesterday, the problem "migrated" back to the PS (which still has the BMW bulb in it). So right now, I have one BMW original bulb on the PS and an after market bulb on the DS. Last night I unhooked the igniter on the DS and cleaned the contacts and made sure everything is tight. I did notice that the plastic cover that holds the bulb in does not turn all the way like the one on the side with the BMW bulb. I do not see how that would cause a migrating flicker though.

Any thoughts are appreciated. Sponsors? Someone must have come across this before? It could be my control unit (how do I test this?)... It could be both igniter's and/or ballasts (but this seems unlikely)... Could the BMW tech be correct that a $50 set of D2S bulbs is different than a $300 set?
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330xi, headlights, hid, xenon

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