[pelotron]

I think there are details being left out. But several people in the comments indicate that there is a Toyota app that provides various features. I bet the app implements some proprietary bluetooth service that the head unit connects to and feeds information through. Or maybe they give the head unit a straight pipe to the internet via that service.

[ezfe]

That very much could be the case, in which case deleting the (now useless, because your car is not connected) app would resolve that - no bluetooth restriction needed.