How to Program a Car Key Modern cars use more than just a key to start the engine. They also have a remote that can lock and unlock doors. Key fobs must be programmed to work properly. It is possible to program certain keys for cars by the owner, but https://car-locksmith54274.blazingblog.com/29319090/ten-things-everyone-misunderstands-about-the-word-car-key-programing