I have a 1989 325I, the brake lining lite came on, so i brought it in for brakes, they replaced the front brakes, but they couldn't shut of the brake lining lite, after 3 weeks, i bought it back, and they thought possible, the rear brakes need to be changes, so the then did the rear brakes, now my lite is still on, they replaced the sensor lite, but i'm having a problem with my brakes sqelling, and only periodically, could they have damaged my calibers in the repair....need advice before i end up having to take it to BMW