Unfortunately, using Android Auto service without data is not possible. It uses data-rich Android compatible apps such as Google Assistant, Google Maps, and third-party music streaming applications. It is necessary to have a data plan to be able to enjoy all the features offered by the app.
Can you use Android Auto offline?
The offline navigation app can now be used on Android Auto without the need to be enrolled in the beta program, so why not give it a try.
Do I need data for Android Auto?
Because Android Auto uses data-rich applications such as the voice assistant Google Now (Ok Google) Google Maps, and many third-party music streaming applications, it is necessary for you to have a data plan. An unlimited data plan is the best way to avoid any surprise charges on your wireless bill.