Finding the right part...

Finding the right part for your car just got easier. A new service from classifieds giant Auto Trader uses your registration number to make sure you get the precise part to match your car.

It looks like a pocket...

It looks like a pocket calculator and is wired into the ignition circuit. Before the driver can start the vehicle, they must watch the LCD screen, which asks them to enter a sequence of numbers within five seconds. It can also get them to operate controls such as the clutch and indicators in a certain order. If they complete the task correctly, the car will fire up. But if they make a mistake, they may be asked to try a new exercise. The engine will not start if they fail repeatedly.