Depending on body type and year of manufacture of the fixing points are different.
Front bumper
-open the hood and Unscrew the screws (stars) that secure the top (spun down).
-wrenched the wheel to the left or right side depending on which side we will analyze first.
-wheel arches Unscrew the screws that attach the fender liner to the bumper.
-perimeter of the lower part and pull out the caps and Unscrew the screws (twisted and inserted from the bottom up).
-from under the car weaken the two screws mounting the brackets.
-assistant exempt corners of the latches in the wings and remove the bumper from the guides themselves.
-remove the connector from the fog lamp (if any).
-remove connector from the PDC (if any).
-if you have headlight washers, disconnected the hoses (so the liquid will not escape on earth, should prepare a special container).
Rear bumper
-open the trunk lid.
-in the side panels openable hatches (to gain access to the rear part of the rear lights).
-under the hatches, Unscrew the nuts and remove the tail lights.
under the rear lights, Unscrew the screws (spun down) (can be caps).
-remove the license plate with the frame.
-under the frame Unscrew the two screws.
-take out the caps in the lower part (inserted from the bottom up).
-wheel arches Unscrew the screws that attach the fender liner to the bumper (so as not to remove the wheels easier to turn a ratchet with a nozzle).
-with the assistant release the latch in the wings, behind the rear lights and opening boot.
-remove the bumper from the guides themselves.
-remove the electrical connector license plate light.
-remove connector from the PDC (if any).
How to remove front and rear bumper Opel Astra F (1992-1998)
How to remove front and rear bumper Opel Astra G (1998 - 2009)
How to remove front and rear bumper Opel Astra H (after 2005)