I’ve looked at the fuse box for my car and found the fuse that powers the Ariel Module. Removing this fuse breaks GPS and all cellular connectivity. Hopefully it breaks automatic updates. I am tempted to leave it disconnected to see if my car skips an update.

The rest of the car works fine. If the political situation heats up then I can remove this fuse to isolate my car from the internet.

Some people connect a toggle switch in place of this fuse so they can leave the car disconnected from the internet when they are not using online functions.

I would be surprised if simply removing a fuse voids my warranty.