The GM ignition switch issue was worse - the key would turn off, killing power, but also locking the steering column. Coasting to the side of the road isn't the worst thing in the world. Not being able to steer while coasting is pretty bad. :wink:
My understanding was that it was an electrical connection problem, and with the key still in the "Run" position, the mechanical steering interlock was not affected. I knew someone who had the problem, and they could get the car going by "wiggling" the key to restore the connection, but the steering never locked.
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The difference between this and the GM issue is that in this case you don't lose your airbags as well when it happens.
Yes, I suppose if the connection broke and the car thought it was "off" you might lose airbags.
My concern with the Model S failure is that it seems to typically happen when you accelerate briskly, for example, to enter a freeway. This leaves you stalled in an area with high speed traffic whizzing by. I know I was a bit concerned where I was even though I did get to the side of the road. There was also a gentleman from Toronto who had the failure in the middle of an intersection, which is not ideal either.