yes it can bruh. You can program logic into the car where other functionality will degrade or outright shutoff IF the cars doesnt have a persistent network connection. Thats how all "As a Service" models work. The second you disconnect from the internet, functionality ceases as a lot of core services dont exist locally on the machine, they are pulled down from the Cloud.
THAT IS TERRIBLE DESIGN. MODEMS BREAK DOWN AND SOME PEOPLE DON'T LIVE IN MAJOR CITIES WITH GREAT CELL SERVICE.