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Key Programming Car Keys Most dealerships and brick and mortar locksmiths are equipped with tools to help you program replacement keys or restore information from the immobilizer. These tools are usually bidirectional OBD-II units. Insert a new, blank key and turn the ignition on to the "on" position without starting the car. Repeat this procedure a number of times within a particular time period that is usually indicated by the door locks turning or a loud chime. Self-programming In modern vehicles keys, they con