1. Remove the rear fenders
2. Prying with a screwdriver, remove the two retainers of the clips of the lower bumper mounting to the amplifier...
3.... and remove the caps.
4. Turn away from the right and left side on one screw of a forward fastening of a back bumper to a wing.
5. Remove the rear bumper by disengaging the bumper-to-amplifier fasteners.
Note: This is how the rear bumper-to-amplifier fasteners are located.
6. Install the parts in the reverse order of removal.