[Still Thinking]

Mr. Hood came to realize that G.M., and the supplier that made the part, Delphi, had quietly changed the switch sometime in 2006 or early 2007, making it less likely that an unsuspecting driver could bump the ignition key and cause the car to cut off engine power and deactivate its air bags.

Now, the details behind the change have become critical issues in determining whether the automaker intentionally concealed a safety defect.

Don't think I'd call failing to resist your customers motions with adequate force, a "safety defect". Don't whack the ignition while you're driving. D'oh!

[jazusamo]

There were other complaints back then that hitting a bump or pothole in the road shut it off.

[Paladin2]

We now have the ability to feature a non-contact RFID type of run switch, including an old fashioned crank/start button.