https://rfid.michelin.com/what-is-rfid/:
“Permanently readable
- RFID used in tires is a passive technology that doesn’t require a battery
- Tire tag can be read even when the tire is moving or rolling
Remains in good conditions during entire lifecycle
- Tire tag is robust against any tire solicitations, ageing, weather conditions
- Tire tag is embedded into tire and can’t be removed, it's not an accessory
Secure
- Tag is locked after writing by the tire manufacturer
- Robust traceability technology against robbery and counterfeiting.”
And to top it off:
“To ease access to tire data between several tire manufacturers, a new organization called GDSO (Global Data Service Organization for Tires and Automotive Components) has been created. The purpose of this new organization is to provide an information service enabling to retrieve data associated to each tire ID (SGTIN96) in the relevant database. A data referential lists all standardized data that can be communicated through public or private access thanks to a standard API.”
⇒ If the governments wants to track the global whereabouts of all cars, they easily can.