I don't mean to hijack the thread but I think a good alternative route (which I ended up taking) for those who are considering the upgrade is to get an android head unit. Much easier installation and no programming, bigger (12.3") and more modern screen, touch screen, seamless integration with CIC.. And you get to install the full versions of Waze, Google Maps, Spotify etc + Android Auto/Carplay.. and best of all can be had for 400-500 USD. Looks great too. I don't see why one should go through the hassle of NBT when it's already several years old.
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