Nah not all do, a mate had his airbag module, I think it was this, was from a Berlina, his was an S and everytime he started it it would beep bout 5 times. No lights. Holden Tech2'd it and programmed it, he had no worries since.
Younglion, it cost me 60 bucks to get my 3 window dash programmed to suit my car wen I swapped it for the single window. Shop around between dealers, you'll get a different price from each.
Jonesy, I dont think they do, look in ur cars handbook, it should tell u how to reset it, or do a search of the forum and there r plenty of threads round on how to do it.