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.
Not so crazy as it looks
https://en.m.wikipedia.org/wiki/Tire-pressure_monitoring_system
Meanwhile, your car has it’s own cellular connection…and you have a phone in your pocket.