Programming Car Keys at Home Reprogramming car keys is a difficult procedure that requires tools that are only available to auto locksmiths. Some manufacturers have technology which prohibits anyone else than the dealership from reprogramming keys. Begin by inserting an empty key into the ignition without turning the engine off. https://g28carkeys59787.wizzardsblog.com/29385261/a-look-at-the-myths-and-facts-behind-car-key-programmed