it stared going off an on just about two hours ago and then when out but if. I turn then off and give it a few mins they come back on I had some work done to that side the same problem happened about two years ago
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1999 BMW 328i Question: xenon head lights on the right side when out
Answer #1patrick mannion from Greg Solow's Engine Room, September 18, 2010, 05:18Master
It could be a failing bulb, loose wiring or poor electrical connection or a failing transformer. The system works on very high voltage and you can easily be shocked so be very careful.
Answer #2mensa man September 27, 2010, 12:19Technician
ballast or transformer wire or the ballast (transformer) itself is on it's way out.