To take off the rear bumper, first take away the trailer hitch, then remove the bumper end caps. Following that, unscrew the upper nuts holding onto the support brackets and the bolts attaching the bumper to the brackets on the bottom. After you finish, pull the bumper away from the car and if your car's rear support brackets are still attached, pull them from the sill. If you remove the bumper support brackets, put them back on the rear sill and tighten them with 55 N.m (41 ft.lbs.) torque. Put the bumper in place and drill the bolts that link it to the right position, checking to see that they are tightened to 55 N.m (41 ft.lbs.) torque. After that, install the bumper end caps and, if there is a trailer hitch, set it up too.