New Toyota cars have the ability to start the car remotely via an phone app. That means that the car has to connect into the internet some way in order to connect to your phone. There is a emergency button that allows you to talk to someone in an emergency. I presume that that bit of electronics connects into the phone network or some other network and ultimately the Internet.
If you can start a car, you (or someone) can probably shut it down too.
They offer wifi through an account with AT&T no one else seems to know what that is. There isn't a visible port for a sim card and none is mentioned at least not in my cursory reading of manual, but I am sure there is one somewhere.
The EmptyShelvesBiden administration is trying to sneak a universal kill switch into automobile requirements but I suspect there is already one built in whether available to users or not.
I may go to AT&T and see what I can find out, might be interesting. I have an iPad that I use as a mobile hot spot but not really the same thing. I have a Toyota App on the iPad and the wife's iPhone which controls all those functions but not a kill switch that I can find, maybe another App to buy for that function.
Everything going forward will have a continuing revenue stream, they need something to replace the service revenue they lost by making cars last so long, and they do last a long time for sure.