 My 328 developed a gear whine at 1000 miles that is still there today at 12000 miles.BMW replaced the differential at 1500 miles, but the whine returned 500 miles later.They refused to fix the problem, so I filed a lemon law claim against BMW.I lost the case, even though the arbitration panel members all heard the noise.The panel stated that it would annoy car owners, but they claimed it did not substantially impact the use, value or safety of the car.BMW researched me on the internet before the case and their attorney was very rude.Now the speedometer is 5mph too fast, and I have to calculate my speed when driving.Can't wait to see what they say about this problem.