Depending on body type and year of manufacture of the fixing points are different.
Front bumper
-under the hood, Unscrew the three screws that secure the grille.
-remove the grille (the lower part serves for themselves and pull up).
-under the grille pulls out two pistons.
-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 and rails-to-bumper.
-perimeter of the lower part and pull out the caps (inserted from the bottom up).
-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
Depending on the model year and model type, there may be screws under the rear lights. To remove the rear lights, the casings of the trunk opening hatches and Unscrew the nut.
-open the trunk lid.
-remove the license plate with the frame.
-under the frame Unscrew the two screws.
-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 J (since 2010)