This. One of the most, if not the most, complex pieces of hardware in a vehicle. They all crater. Shouldn't crater too early though. I doubt its sport mode, that has existed on other models (like the 3) for awhile. I'm thinking one of the more silent hardware or manufacturing line changes that takes place throughout the year. Whatever the issue is, I'm fairly confident they'll take care of it quickly and if possible, alert other affected owners if there's something they can do. We have a 3 and they actually set up a special service program for it, complete with mailed notice, because some of them shipped with the spare tire pressure off spec...