Attackers simply do not have time to do it. In the machine are installed dozens of types of devices and the size of each hardly more than a matchbox. And this apart from the fact that in addition to working devices in the car are also built in models. In order to find them all have to dismantle the car on cogs. But it takes so much time that at least a few of the devices will be able to give a signal that your car will be found.