So you have Android Automotive? (stupid name)

Where does it get it's internet connection from? It's going to need that to keep the maps updated.

I'm not sure how long the Google Maps app will stay alive in your case. I doubt AA will get updates 10 years after a sale, but even if it doesn't and you're stuck on an old version of Google Maps, assuming the underlying API doesn't change, I guess that doesn't matter?