Alternator/generator/regulator Problems of BMW M3

400 miles out of warranty, the electrical system fault warning began to come on. When this happens all gauges bottom out quickly then return to normal. Sometimes, the restraint system, edc or other warnings will start. I don't experience any problems driving the vehicle. The battery has been replaced and alternator has been tested and is performing as it should. When connected to the BMW computer for error codes it doesn't show any codes or that the warnings have gone off. I have driven it for 18000 miles trying to find just one common thing that will make this happen. I have found nothing to cause this warning. It may go off constantly one day and not happen again for 2 weeks. Sometimes, after going off for several times, the gauges for rpm, temp will drop to their lowest indications and the speedometer will stick at whatever the speed is at the time. I have emailed BMW of na and they informed me that the recent recall for this problem does not include the m series. I was told that it could cost up towards $5000 to find a loose wire. Didn't think I should have to pay that much since it was just 400 miles out of warranty. I don't think that it is a loose wire because I would have noticed that as a common factor, like hitting a bump in the road. After reading many BMW forums, this seems to be a problem associated with the M3 as well as the other series.

See all problems of the 2009 BMW M3 🔎.