Depending on the year of manufacture, the mounting locations may vary.
Front bumper
-open the hood.
-we release the clamps (you need to turn ninety degrees) and remove the radiator grille.
-remove the side marker lights.
-unscrew the bolts securing the left and right bumper pillars.
-remove the cover of the lower hole of the grille.
-in the wheel arches, unscrew the bolts securing the left and right side brackets of the bumper.
-in front of the radiator, unscrew the bolts that secure the bumper amplifier brackets to the body.
-with an assistant, carefully pull the bumper assembly forward (make sure not to break the wires).
-disconnect the electrical connectors (if any).
Rear bumper
-open the trunk lid.
-in the trunk opening, unscrew the four screws.
-in the wheel arches, unscrew three screws on each side and remove the side parts of the rear bumper.
-unscrew three nuts on each side and remove the middle part (look at the wires).
-disconnect the electrical connectors.
Nissan Xterra II (2005-2015) bumper removal.