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      02-10-2012, 05:33 PM   #9
Jeff@TopGearSolutions
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Drives: C6 Z06, 09 335i, 10 335xi
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Quote:
Originally Posted by turbocomppro View Post
Couldn't you just troubleshoot it by switching the left and right bulbs?

If trouble stays on the same side, it's the ballast. If the trouble switched sides, it's the bulb.
Yes. It's worth mentioning that you must replace with OEM osram or sylvania bulbs as knock off bulbs will LIKELY blow your factory ballast.
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