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I own a 2002 X5 with factory xenon lamps. For the most part they work well but on a few occasions both low beams have just shut off and have had to drive home on the high beams.
The next day they both work fine. Connections all check out the bulbs are good, the the fuse is good. Anyone have any ideas ?
 

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Could be the LKM. Have the $tealer check for fault codes in the dash memory module. A new LKM has to be programmed to the vehicle.
 
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