I do know that it was formerly a lease vehicle.
Well, after my COVID-19 shot, I went over to the dealer, and had it looked at. As it happens, the senior service writer (whom I've known since infancy -- his, not mine) looked at it personally, and it's a GPS tracker of some sort, and wired in such a way that removing it would keep the car from powering up. He also decided that whoever had done it had done a lousy job, and moved it behind a panel.
The sales dept. got me the name of the dealership that had been the former owner. I went over to that dealership (only a few miles from my home), only to find that a former owner of
the dealership had been the former owner.