The front brakes and rotors fit the BMW X1 and have worked great for over a year and still work. Now the original rear end wears out and there are problems engaging the rear rotors and brakes when they rub against something. My mechanic had to remove them after 2 hours of adjustment to try and get them working, to no avail. I'm stuck with rear rotors and brakes that I can't use since I bought front and rear brakes and rotors over a year ago.