Interestingly, in the EU, all cars sold since mid-2018 have a mandatory SIM card as part of the eCall system. In the event of a crash, it automatically connects

Interestingly, in the EU, all cars sold since mid-2018 have a mandatory SIM card as part of the eCall system. In the event of a crash, it automatically connects to the driver to the local 112 emergency number, but also sends telemetry (location, direction of travel, VIN and some other details). There are definitely privacy implications to this system. It doesn't generally help when the vehicle enters the water, because the signal attenuates so quickly in water that it's very unlikely that the modem will be able to connect to a tower.