As cars get smarter so do the thieves targeting them.
Dog and Lemon Guide editor, Clive Matthew-Wilson, says modern car keys often contain a computer chip which only recognises the car it belongs to - if you do not have that particular key you cannot start the car.
But Matthew-Wilson says that has prompted thieves to target keys instead of vehicles.
He says robbers are stealing keys from pub tables, handbags and particularly gas stations, where people leave their keys in the car when they go inside to pay.
Matthew-Wilson says people need to start treating their keys as they would their wallet and never leave them in a public place.
