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Key Programming Car Keys Most dealerships and brick and mortar locksmiths have tools to help you program replacement keys or restore immobilizer information. These tools are usually bidirectional OBD-II devices. Insert a new, blank key and turn the ignition to the "on" position without actually starting the car. Repeat this process several times within a specified period of time, which is usually indicated by the door locks being on the move or chiming. Self-programming In the majority of modern vehicles the key fob ha