The purpose of an airbag is to save lives by creating a barrier between the passenger and the dash. In order for an airbag to be effective, it must deploy very rapidly to create an instant buffer ("Auto Safety"). The speed of the inflation is around 200 mph and the entire inflation/deflation process takes less than half a second ("Are Airbags"). When you are involved in a frontal collision at speeds over 15 mph, a number of things happen in about 30 milliseconds: the sudden deceleration of your vehicle causes two sensors to send a signal to the diagnostic module, which self tests to confirm that a crash is taking place, then signals for the airbag