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People are getting fed up with all the useless tech in their cars
(www.theverge.com)
This is a most excellent place for technology news and articles.
Wait until you see what it takes to do so! I had an OEM nav unit in one of my cars, and the map update is sold on a DVD (!) and costs something like $400. I'm going to go with... no. (And yes, I checked to see if an .iso was available on any pirate sources; it wasn't.) I'll just run Google Maps or an OpenStreetMap client on my phone, thanks.
I have yet to find a way to update/update the system, even paying for it.