Serious safety issue with 2004 BMW 330
My 2004 BMW 330 will suddenly lose power (all red lights flicker then come on; vehicle loses power, suddenly jolts to a near halt for about 2 - 5 seconds, then picks up again). Brake light and yellow warning light stays on, but disappears after I turn off engine and restart. Happens sporadically and unpredictably. My mechanic has already replaced the harness and the DME (at great expense) but problem still persists. Has anyone seen this before?
I would check the battery cables, alternator cables and all grounds on the car for corrosion and being loose. What is the voltage on the battery? Alternator fine?
Mechanic says all that checked out. Not sure what to do next.
Try another mechanic preferably a BMW independent shop.
Looking for a Used 3 Series in your area?
CarGurus has 33,622 nationwide 3 Series listings starting at $1,000.
Search BMW 3 Series Questions
BMW 3 Series Experts