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Old 09-09-2012, 09:12 PM   #1
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Car's rejecting headlight bulbs

About two months ago while driving, I noticed that my drivers side CBI bulb was flickering. Mainly on acceleration/deceleration or harder corners.

Swapped the problem bulb to the passenger side to see if it followed the bulb - it did. So now the bad bulb is in the passenger side and doing the flickering. I contacted MotiveMods (who I got the bulbs from) and they found no problems with the bulb while one of them ran it in their personal vehicle. I ran a normal OE Phillips bulb in place of the bad bulb in the meantime. I had no problems at all running this set-up for 4+ weeks. MotiveMods somehow ended up sending me a new CBI bulb anyways().

Last night then, I put my new bulb in my passenger side and took the temporary Phillips bulb out. After that, I tested the lights and the drivers side was flickering a little bit. I gave the car a rest and hoped it'd fix itself. Then tonight while driving, my drivers side headlight started doing the SAME SH!T.

That bulb has been in there since I swapped my old bulbs left-to-right with NO PROBLEMS. Now since I swap an unassociated bulb out (passenger side), now my drivers side acts up?!

I seriously have no idea what's going on. Also, the car isn't necessarily picking the best bulbs to mess around with.

Thanks in advance for any help.

2015 M235i 6MT
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Old 09-10-2012, 02:24 AM   #2
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Location: Philadelphia
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Hmm... I think there's a chance it's your ballast or igniter killing the bulbs. I know the ballast is new... but idk what else to blame. Alternator maybe if the voltages are really out of whack

Last edited by TerraPhantm; 09-10-2012 at 02:26 AM.
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