How to Program a Car Key Modern cars have more than a key to start the engine, they also come with a remote that can lock and unlock doors. Key fobs must be programmed in order to function properly. Certain keys for cars can be preprogrammed by the owner himself, https://carlocksmith43789.blogsvila.com/29534166/car-key-programer-it-s-not-as-difficult-as-you-think