Perhaps they're emulating the key fob signals?
that's been the scheme since day one, how long does it take a fast micro to brute force a limited number
Are they beemers?http://hackaday.com/2012/07/07/keyless-bmw-cars-prove-to-be-very-easy-to-steal/
They also always used the passenger side door.
Researchers at the University of California at San Diego and the University of Washington say that in their tinkering, they hit upon a cyberattack method by which thieves could cause large groups of cars to report their vehicle identification numbers (from which it is easy to determine the cars' years, makes, and models) and GPS coordinates. Having learned where the most prized vehicles are parked, the technique would allow criminals to issue another set of commands that remotely bypass the cars' security systems, unlock their doors, and start their engines. A similar technique, said the researchers, could be used to listen in on a driver's phone conversations, or worse, to disable one or multiple cars' brakes as they travel at highway speeds.
Darn! Only worked on the trunk. I was still able to open doors and start the car. I need a metal box I guess.