The airbag diagnostic module (or control unit) does a lot more than monitor your safety restraint system. This electronic component has evolved from a series of inertia switches and triggers to an Event Data Recorder (EDR), similar to those found in airplanes. This unit, first of all, isn’t black. Second of all, this unit is fast becoming one of the most important pieces of equipment in a car today. With the ability to record events and circumstances, manufacturers, lawyers and governments are all vying for both control and accessibility...