How to Program a Car Key Modern cars come with more than just a key to start the engine, they also include a remote to lock and unlock doors. These key fobs must be programmed in order to function. Some keys for cars can be programmed by the owner themselves https://g2868197.rimmablog.com/28834317/what-is-car-key-programing-history-of-car-key-programing-in-10-milestones