Depending on the year of the attachment points are slightly different.
Front bumper
-open the hood and Unscrew the screws that attach the top part of the bumper.
-on the perimeter in the bottom part Unscrew the screws and take out the caps.
-wrenched the wheel and removed the fender liner.
-for wheel arch liners Unscrew one screw on each side holding the bumper corners to the wings.
-with the assistant pulls the bumper forward.
-remove the connectors from the equipment (if any).
Rear bumper