I have an 06 330xi which I bought as a CPO about 7 months ago. I've been hearing a noise while the car is motion that is reminiscent of a wheel bearing gone bad, at least as best as I can describe it. I had the dealership check it out and they claim that the car is out of alignment and the tires have worn abnormally thus creating the noise when the cars in motion. They said it needs a 4 wheel alignment and 4 new tires at a cost of $1400. There are 41,000 miles on it and the tires appeared to be new when I bought it. Tread depth is good all around. Thoughts & comments are appreciated, thanks!