Hi @JeffHM! Welcome to community. 👋f
Pandora automotive implementations require you to use a compatible iPhone or Android with an active internet connection in order to stream music in the car.
The integrated Pandora app found in some vehicles allow you to connect your phone to your vehicle and control playback and thumbs through the infotainment system.
Similarly, the Pandora app can also be used with Android Auto and CarPlay if this option is available for your vehicle.
Hope this helps to answer your questions.
Use your mobile device only when conditions allow and as permitted by applicable law.