the only thing i'd worry about is the different airbags are designed for different cars... a 6th gen airbag is specifically designed for the car its going into... so i'd imagine there'd be problems if the airbag ever deployed... like it may hit the rearview mirror... the window (side or windshield) ...meaning it probably wont be able to deploy properly.
Oh well, its just a thought. I dont wanna screw with my airbag at all I guess... theres a specific one there for a reason.