-remove the grille (held by the latches).
-Unscrew the screws that attach the brackets.
-Unscrew the nuts that attach to the front panel.
-wheel arches Unscrew the screws that attach the bumper to the wings.
-at the bottom, take out the caps.
-remove bumper traffic for themselves.
-remove the connectors from the fog lights (if any).
-wheel arches Unscrew one screw on each side that attach the angles to the wings.
-in the trunk on the rear panel Unscrew the screws.
-remove the bumper itself.
How to remove front and rear bumper Opel Astra G (1998 - 2009)
How to remove front and rear bumper Opel Astra H (after 2005)
How to remove front and rear bumper Opel Astra J (since 2010)