When you guys had your system installed in your cars, did the people wire everything right so that it didn't tamper with the Navigation and the navigation voice? I have always wondered about this, but it seems to me it would all be done correctly since all you guys went through with it right? I need some reassurance on this topic, since I'm thinking about getting one as well but worried that it might affect the navi - i might sell the car one day, don't wanna mess anything up. Thanks guys.

 

When you hook up an aftermarket head unit, you will lose the navi voice. I'm not sure if there is any way around it. Personally, it really doesn't bother me as much as actually having the voice (annoying).

If you ever sell the car, once you re-install the factory radio, the voice will work again.