I have a 2002 BMW M3 that was running rough and had a check engine light on. I took the M3 to an independent shop and they diagnosed it as bad ignition coils. They also told me that BMW put out a bulletin on defective ignition coils and that they will be covered under warranty even though the car is out of the factory warranty. I took it to a BMW Service Center in Glendale and they will not replaced the coils because I had aftermarket spark plugs. I told them about defective ignition coils and they wanted over $300 to put in new facoty spark plugs then they can replace the ignition coils. There is nothing wrong with the aftermarket spark plugs that I replaced and they can't cause coil failures! I declined the work and took it to New Century BMW. Abe was my Service Adviser and they replaced the coils under warranty and car runs great! Very happy with New Century. Disappointed at the Service Center in Glendale.
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