Loosen the front wheel bolts, chock the front wheels, then raise the rear of the vehicle and support it securely on jackstands before removing the rear wheels. For a quick check, measure the thickness of the friction material remaining on each brake pad through the top of the caliper body; if any pad's thickness is not within specification, all four pads must be replaced as a set. For a comprehensive check, remove and clean the brake pads to allow for the examination of the caliper's operation and the condition of the brake disc on both sides.