Visit our site http://www.autokeygroup.co.uk/ for more information on Ford Replacement Keys. Ford keys are made out of brass - or so they should be - so they don't wear your ignition and locks out. If given a steal key, motorists should be aware that both your ignition, locks and key will all wear out faster. At the beginning, when intelligent car keys were first introduced, they were mostly used in luxury cars. The system uses several microchips and sensors that transmit information to the smart key, which opens the car's doors thanks to a radio transponder chip that is installed in the key.