what do you mean, the car was hit? its been in an accident?
The air bag warning needs to be checked, it could be the steering wheel or seats-might be a connector that needs checking, or resetting in the ECU using software/laptop. Check undeer the passenger seat, make sure the orange plug is fitted tight and clean-might just be that, do a search of this forum and you should find help on the subject, seems often the fix is to unplug, clean, and plug back in...