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Key Programming Car Keys Most brick and mortar locksmiths and dealership parts departments have tools to help you program replacement keys or restore immobilizer information. These tools are usually bidirectional OBD-II units. Insert a brand new, blank key and turn the ignition to the "on" position without actually starting the car. Repeat this procedure a number of times within a particular time period that is usually indicated by the door lock cycling or a chime that sounds. Self-programming In most modern automobiles, t