it sure is a common problem for the astra
and its not the cover you need to replace but more like the hole steering wheel airbag
its 2 torx screws and an airbag plug
best to disconnect the battery and leave it off for 10 mins before unplugging and replugging the air bag
screws are here one on the other side to

airbag plug has a tab you need to remove 1st before it will unplug
