E46Fanatics - View Single Post - Poll: Did you have an OEM Xenon bulb/ballast failure only on one side? Which side?
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Old 01-28-2013, 11:17 PM   #14
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Join Date: Jul 2011
Location: Charlotte NC
Posts: 2,747
My Ride: 2001 BMW 330ci
Originally Posted by Scot Bailey View Post
This morning when pulling out of my driveway I noticed a slight blink in the driver side light on my 2004 325XI with factory xenons. It happened a couple times on the way to work. It is still working, but I guess I am on borrowed time. My question is when a xenon headlight goes out, how do you tell if it is the bulb itself, the ballast, or the igniter ?
Check the red connector that screws onto the bulb, and make sure the tabs that secure it have not broken. If they have, then they can be causing a bad connection.
Swap the bulbs around, and see if the problem switches to the other side. If so, it is the bulb. If not, it could be the ballast. Try swapping it to the other side, and see if the problem moves to that side.
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