The airbag may cause lag on some devices, but if possible it'd be cool to see. And, about the working siren, I think that it would be a cool feature, especially on videos, like a fed Q on the burnside police, powercall and stuff.
how to use the search bar. step one: search your question step two: realise 23 other people asked the same thing step three: realise airbags are not gonna happen
I remember reading somewhere that the devs were not interested in implementing airbags because of the lack of passengers in the vehicles, due to the rating of the game. Therefore, with no passengers, airbags would just be a "cosmetic" thing and I guess it makes it less interesting to work on. EDIT : I also remember that the devs already planned to implement horns and sirens, but I have no idea when.
Thank you for that, good to know that the devs have planned that, and maybe airbags are useless. but it'd be cool with the stig thing.