Because each tire transmits a unique identifier, vehicles may be easily tracked using existing sensors along the roadway.[19] This concern could be addressed by encrypting the radio communications from the sensors but such privacy provisions were not stipulated by the NHTSA.
See the white, metal looking thing in the image? That's another tracking device from the government to track people wherever they do. They even put it in all 4 of your wheels so they will know when to issue you a traffic ticket. Remove them. /s