I agree with last poster, very easy to do. Front and Rear. Out of pocket costs with rotors for me is about $40.00 rears are little more expensive, but a trip to the junk yard saves some bucks. The only thing that I can think of is that someone put the wrong type of fluid in the system which just wrecked everything so you have to go for a new Master Cylinder, Calibers, and such. What type of car is it.