I have been having an ongoing issue with my brakes. In a nutshell...my brake pedal goes to the floor. I have taken my vehicle to the same service shop five times now.Each time my brakes would be fine for about 200 miles...then they would fail again. They have replaced the master cylinder twice ( since I was not losing ant brake fluid). Now, they are telling me one of my calipers was sticking causing this to happen. Could that really be the cause? Shouldn't they have been able to ge the correct diagnosis the first time by looking at the brake pad? I am not sure if I should believe them..... I am thinking about pursuing the lemon law. Any insight??