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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 information from the immobilizer. These tools are typically bidirectional OBD-II devices. Insert a brand new, blank key and turn the ignition on to the "on" position without actually starting the car. Repeat this process a couple of times within a particular time frame that is usually indicated by the door locks turning or a chime that sounds. Self-programming In modern cars keys, they