Both the pieces of the caliper should be replaced at a time and never single piece should be replaced. Before taking off the caliper, one has to do the following: apply the brake pedal several times, unscrew the wheel lugs, and jack up the car placing it on proper jackstands and then remove the wheels. However, the next process is to remove the brake hose by unscrewing the banjo bolt and then cover the opening of the hose to avoid the introduction of dirt in the brake system and secondly to loss of brake fluid. If only caliper is needed to connect to the other components, support the caliper with wire instead of disconnecting the hose. Next, to the caliper side, you need to unscrew the caliper mounting bolts and subsequently, take out the caliper, inasmuch as it is possible to detach the caliper bracket from the steering or rear knuckle. In the installation process, perform all the steps in the remaining of the section in the reverse manner, but make sure you tighten the caliper mounting bolts and any of the bracket bolts to the required torque value. Replace the old gasket type washers with new sealing washers on both sides of brake hose banjo fitting and tighten the banjo bolt to required tightness. Subsequently, evacuate the brake hydraulic pressure, fit the wheels and the nuts, alleviate the car from the stand, and then tighten those nuts up to the recommended level of turn. Last of all, examine the functioning of the brakes closely before taking the car on the road.