Keyless theft also known as relay theft is so simple it is frustrating that manufacturers are not doing more to solve this. A thief needs two small boxes of electronics, which thieves can then use to open your as thou they have the key and then drive away in your car in as little as 60 seconds.
Thieves work in pairs to commit keyless relay car theft, with one thief holding a relay amplifier that grabs the signal from the car key in your house, and the other thief has a relay transmitter to grab this and trick the car.
the other thief will stand by the car, and when their receiver picks up and replicates the amplified signal from the key, the car will be fooled into thinking the legitimate owner is there, allowing the vehicle to be unlocked and driven away.