Most modern systems also include keyless entry, allowing you to enter the car without inserting a key or hitting a button on the fob. The newest systems take entry and ignition a step further.

Keyless car entry systems let drivers open and start their cars without taking their key out of their pocket. Thieves, normally working in pairs, will target a car parked outside a house.

Thieves are increasingly thought to be using technology to bypass entry systems on keyless cars. But industry body the Society of Motor Manufacturers & Traders (SMMT) said "new cars are more ...