Depending on the year of manufacture, the attachment points may differ.
Front bumper
-open the hood.
-in the opening between the headlights take out three pistons (inserted from top to bottom).
-around the bottom of the bumper, Unscrew nine screws (spun up).
-turn the wheels to the side.
-in the wheel wells, Unscrew the screws that secure the fender liner (front).
-unscrew one screw on each side (spun up) that attach the corners of the bumper to the wings.
-we release the latch in the wings (pull the corners of the bumper towards you).
-with an assistant, pull the bumper forward (look for the wires).
-disconnect electrical connectors.
Rear bumper
-open the trunk lid.
-in the opening of the trunk, Unscrew the six bolts and take out two pistons.
-unscrew the four screws (spun up) around the perimeter of the bottom of the bumper.
-in the wheel arches, we release the fender liner (rear).
-unscrew one screw on each side (spun up) that attach the corners of the bumper to the wings.
-we release the latch in the wings (pull the corners of the bumper towards you).
-with an assistant, pull the bumper back (look for the wires).
-disconnect electrical connectors (if any).
How to remove front and rear bumper Toyota 4Runner (1995-2002)
How to remove front and rear bumper Toyota 4Runner (2010+)