Calipers should always be replaced in a pair, meaning that if one of them is bad, then both of them should be replaced. Before starting removal, use a wrench to slightly unscrew the wheel lug nuts, use a jack and place it correctly to lift the car off the ground and place jackstands on it before removing the wheels. Remove the banjo bolt from the brake hose and plug it so that it does not get contaminated and also so that there is very little leakage of the brake fluid. If only reaching other components, it is better to support the caliper with a wire instead of hanging on this hose. Subsequently, take out the caliper mounting bolts and then the caliper, thus, the caliper bracket will be separated from the steering knuckle or rear knuckle if needed. As for the installation, reverse the above-stated process, but do not forget to tighten the caliper mounting bolt and the bolts of any brackets to the required torque. Replace sealing washers on both sides of the brake hose banjo fitting and tighten the banjo bolt to the torque that has been recommended. Last but not the least, carry out the brake system bleed, arrange the wheels and the lug nuts and finally drop the car, and finally tighten the lug nuts to the recommended torque.