I know it would be hard to model, but I think airbags would be a big step foward for Beam NG! No other game has them, so you'd be the first!
Welcome to the forums! Just a heads up, there is already a thread about this. Before you make a new thread, check over the forums and make sure it hasn't been posted already. Otherwise, we will have too many of the same topic.
In the original thread, that I cannot locate, people seem to reach the consensus that two giant 'marshmallows' wouldn't be a good thing to drive around with should your doggie bag deploy. Although game development isn't a democracy, so it is entirely possible. Its early development stages. Any information on minor details on things like error bags will be half-useless and it's honestly too early to even think on small things like that. For now the developers are more focused on core features like the physics engine, content, and core gameplay elements. The best you can hope for is that a developer answers this, although I have a feeling that they aren't at the stage of considering these small details.