as for the airbag light that sounds about right for it should stay on 10 sec max after start up up so not a fail its a pass

as for snapped bolt if u can see the bolt missing its a fail if not its not testable eg if u have alloys its a fail if u have wheel trims covering the bolt pass

as for nocking if there is move mont side to side or up and down fail no movement pass the bushes have to hanging out to fail

hope this helps