Montgomery County officials are sounding the alarm about a growing problem that challenges one of the simplest habits drivers have always relied on: locking their car doors. While pressing the lock button on your fob may provide peace of mind, experts warn that it is no longer a foolproof way to protect your vehicle.
The rise of keyless entry systems has introduced convenience—but also a new kind of vulnerability. Thieves equipped with specialized devices can intercept or amplify the signal from a key fob, even when it’s safely tucked away inside your home. By capturing this electronic transmission, criminals can unlock vehicles and, in some cases, drive away within minutes, leaving little trace of forced entry. Officials explained that this type of crime, often called a “relay theft,” has been increasing, and it poses a serious challenge for both law enforcement and vehicle owners.
To counter these high-tech break-ins, Montgomery County officials recommend that drivers take extra steps beyond simply locking their cars. One of the most effective methods is using a Faraday bag—a small, signal-blocking pouch designed to prevent thieves from capturing your key fob’s transmission. Parking your car inside a garage or in a well-lit, secure location can also reduce the risk of theft. For those who park outside, layering security with steering wheel locks or other visible deterrents can add an extra barrier against opportunistic criminals.
The warning comes as car thefts linked to keyless entry systems continue to climb, not only in Pennsylvania but across the country and internationally. While manufacturers have built in rolling code systems and encryption to strengthen security, criminals have stayed a step ahead by developing new ways to exploit the technology. For drivers, the lesson is clear: convenience can come at a cost, and proactive measures are essential.
Locking your car remains important, but in an era of digital theft, it’s only the first line of defense. Officials urge motorists to think beyond the lock button, take simple precautions, and stay alert to evolving threats. As one county official put it, “If you rely only on locking your car, you may be giving thieves the opening they’re waiting for.”









