Ok, my rear discs are showing signs of grooving with less than 250 miles on the car. The fronts are fine. Since this seems to be a common problem, does anyone know what is being done about it? Just a slight annoyance in an otherwise perfect (so far) car, but one that could turn into a big deal quickly if not addressed by Mazda. Incidentally, what is the story with brakes nowadays? Why can't manufacturers get them right? It seems like most new vehicles from of any brand have some sort of brake problem. Have cars not had brakes since their inception? You'd expect the problems to crop up somewhere else.