2003 Volkswagen Jetta Air bag replacement and airbag comput

I have a station wagon TDI and the passenger dash airbag, the drivers side curtian and seat air bag all went off. My question is; do I need to replace them along with the airbag computer to get the airbag light to function properly (light up when the key is turned on and then turn off after 6 seconds or so)? Actually my question is what is the minium I can get away with replacing and make the light function properly? Thanks!