At 90,000 miles, my car had an electrical fire. It just happened last night, so I don't have all the specifics yet, but the fire investigator said it was clearly a manufacturer defect. The car was parked and hadn't been driving in more than 3 hours.
A quick search on Google demonstrates that this is a common occurrence with some BMW models. I am hoping that after this is all said and done, I am still a fan of BMW's customer service.
Until now I my only issue with my car was the run flat tires, they are the worst. I have replaced the full set twice in 90,000 miles. And not because of balding, but because the tires have had holes in them. Run flat tires are not cheap!