Depending on the year of manufacture, the attachment points may differ slightly.
Front bumper
-open the hood.
-under the hood, take out the four pistons (one screw, if any) that secure the top of the bumper.
-from the bottom side, unscrew the screws (twisted from bottom to top) that secure the bottom of the bumper.
-wheel the wheels to the side.
-in the wheel arches, Unscrew the screws that secure the wheel arch liners (front part).
-behind the wheel arch liners, take out one piston on each side, which attach the corners of the bumper to the fenders.
-release the latches in the wings (pull the corners towards you).
-with an assistant, we pull the bumper forward (look behind the wires and hoses).
-release the connectors of the electrical equipment (if any).
-disconnect the headlight washer hoses (if any, liquid may leak).
Rear bumper
-open the trunk lid (doors).
-in the opening of the trunk, Unscrew two screws on each side and remove the taillights.
-under the rear lights, take out two pistons on each side and remove the lining upwards.
-from the bottom side, unscrew the three screws (screwed from bottom to top).
-in the wheel arches, Unscrew three screws on each side that secure the wheel arch liners (rear part).
-release the latches in the wings (pull the corners of the bumper towards you).
-release the latches in the trunk opening.
-with an assistant, we pull the bumper back (look behind the wires).
-disconnect the connectors of the electrical equipment (if any).
How to remove front and rear bumper VW T4 Transporter, Caravelle, Multivan
How to remove front and rear bumper VW T5 (Transporter, Caravelle, Multivan)