You will need to have a floor jack, torque wrench, Allen key set, wire brush, ratchet and socket set, flathead screwdriver, ruler, piston retraction tool, brake system cleaner, and pliers. The next step will be to put the rear part of your car on jack stands and start unscrewing the wheel lug nuts. Then remove the wheel to get full access to a brake pad. Make sure that your store the unscrewed lug nuts in a proper place, so you will be able to find them when wearing the wheel again. Surely, it is also important to clean the brakes properly using the cleaning aerosol. After finishing this task, proceed to the stage of removing the caliper. As soon as the brake caliper is in your hands, remove the pads from it and examine the brake disc thoroughly. If you see that the disc does not look reliable, consider replacing it too. Finally, take the new pads and install them in their place in the caliper and reinstall it. You will also want to check the brake fluid and add it if necessary. Put the wheel on the car again and double-check the replacement was successful. Do the same with the opposite brake pad.