How to Program a Car Key Modern cars have more than just a single key to start the engine. They also have a remote that can lock and unlock doors. These key fobs have to be programmed to function. Certain keys for cars can be preprogrammed by the owner himself, https://carlocksmith20852.worldblogged.com/35115211/what-is-the-reason-why-car-key-programing-are-so-helpful-when-covid-19-is-in-session