I own a 330xi and have about 25,000 miles on it. The brakes were just inspected and have about 6.3mm remaining (rear) and 7.8mm (front). The on board computer tells me the rears don't need to be replaced for another 31,000 miles and the fronts don't have to be replaced for another 35,000 miles. I'm used to driving a Lexus where brakes are replaced every 25,000 miles without fail. It seems strange that I could go about 60,000 miles without changing the brakes on this car. Is this normal for a 3 Series? Moroever, at what minimum pad measurement does the dealer replace the brakes as part of free scheduled maintenance?