Depending on the model year and body type of attachment may vary.
Front bumper
-open the hood.
-take out the caps (inserted from top to bottom) that secure the grille and the upper bumper section.
-at the bottom, take out the caps and Unscrew the screws (twisted and inserted from the bottom up) that secure the protection of the engine and wing flaps.
-wrenched the wheel left or right, depending on which side of the bed will disassemble.
-wheel arches take out the rivets and removed the fender liner.
-attach the fender liner to the side and Unscrew one screw on each side (spun upwards) holding the corners to the wings.
-s the assistant pulls gently on the bumper itself.
-remove the connectors from the fog lights (if any).
-remove connector from the PDC (if any).
Rear bumper
-in the boot remove the side trim (you need to access the rear part of the rear lights).
-for casings, Unscrew the nuts and remove the tail lights.
-the rear lights take out one piston on each side (inserted upside down).
-Unscrew the two screws on the edges of the opening of the trunk.
-wheel arches take out the rivets and removed the fender liner.
-for wheel arch liners Unscrew one screw on each side (spun upwards) that secure the corner bumper to the wings.
-at the bottom, take out the caps (inserted from the bottom up) that secure the lower part.
-with the assistant release the latch and gently pulls the bumper itself.
-remove the connectors from the equipment (if any).
How to remove front and rear bumper Nissan Altima L30 (1998-2001)
How to remove front and rear bumper Nissan Altima L31 (2002-2006)
How to remove front and rear bumper Nissan Altima L33 (after 2013)