In fact, as the market research company Technavio, noted in 2017, the significant growth of the automotive electronics sector was driven specifically by the need for added driver convenience and concerns about car theft. So, it's a sobering thought that these same sensors, computers and data aggregation systems are what criminals now use to steal cars.
The convenience offered by the keyless entry system (KES), is one such example. KES enables drivers to passively lock, unlock, start and stop the engine by simply carrying the key fob along with its integrated signal transmitter. The basic function of the system is for the car to detect the signal from the fob.
If the signal is strong enough, generally when the fob is within one metre of the car, it will unlock and allow the engine to start, usually using a push-button system. Attacks on the KES typically use a method of amplifying and relaying the signal from the fob to the car. This "tricks" the car's system into thinking that the fob is within one metre, and the system disarms.