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Key Programming Car Keys The majority of brick and mortar locksmiths as well as dealership parts departments have tools that can help you program replacement keys or restore the immobilizer's data. These tools are usually bidirectional OBD-II devices. Insert a new key and turn it to the on position, without starting the engine. Repeat this procedure several times over a predetermined time period typically indicated by the door lock being on the move or chiming. Self-programming In the majority of modern automobiles the key fob