In an era of encrypted comms and hardened perimeters, why breach the firewall when you can watch for [Tire Co. Redacted]? This talk exposes how Tire Pressure Monitoring Systems (TPMS)-those chirpy, chatty little wireless tire valves-can be repurposed as passive perimeter tripwires or active remote triggers. Whether you're securing a location, testing your neighbor's paranoia levels, or just really into wheels, this RF reconnaissance technique is a clever (and totally legal-ish) way to make your mark on mobility monitoring.