Direct TPMS systems utilize radio frequency (RF) technology to transmit pressure data and other information to the vehicle's electronic control unit (ECU). RF-based TPMS systems provide a reliable and safe indication of tire pressure to the driver. Millions of vehicles have been installed with TPMS over the past 15 years and the numbers continue to increase rapidly, both in the U.S. and globally.
The likelihood of a situation in which unscrupulous individuals could hack into a sensor and "fool" the TPMS system is extremely unlikely, as is a scenario where a driver's location could be intercepted and identified.
TPMS systems were created to keep drivers safe by indicating a low-tire pressure situation, which they have done since inception. Schrader has spent more than 15 years designing and developing TPMS systems, with millions of operating miles in everyday field conditions, ensuring these systems operate as intended. Hacking, intercepting, or gaining location data by a hacker is extremely unlikely.
For more information on the subject, read this article by Bob Ulrich from Modern Tire Dealer: "Fear not: Wireless car hacking through the TPMS is extremely unlikely."