Calipers can be replaced, but it is not a simple process. The calipers are the brakes that grip the rotor to slow and stop the vehicle. They are located inside the brake pads and are held in place by bolts. In order to replace the calipers, the brake pads must be removed, as well as the bolts that hold the calipers in place. Once the calipers are removed, the new ones can be installed in their place.