It was explained to me as if they track individual cars so I assumed they extract identifiers. I don't know much about BT so I had no reason to question if that

It was explained to me as if they track individual cars so I assumed they extract identifiers. I don't know much about BT so I had no reason to question if that was possible. I asked about TPMS as an alternative and they said bluetooth was more reliable since many cars didn't use in-wheel transponders.