I am stuck right now in a small US town 3000 KM from home with a cracked rear wheel and 2 bad rear tires. One interesting post with good background was posted to me in another forum and I let you have a look here is what the Gentleman posted, it is the best feedback I got on the dilemma I am in at the moment stuck here in a hotel room waiting for a new wheel to arrive at the local BMW dealership ......
So it sounds like BMW still have this 19" wheel crack problem!! Well documented in the UK that one.
See here:
http://www.bbc.co.uk/blogs/watchdog/200 ... heels.html
Update to the story here:
http://www.bbc.co.uk/blogs/watchdog/200 ... alter.html
I have 18" RFT's and the rears needed changing around 12,000 miles!