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Key Programming Car Keys Most dealerships and brick and mortar locksmiths have tools that can help you program replacement keys or restore immobilizer data. These tools are usually bidirectional OBD-II units. Insert a brand new, blank key and turn the ignition to the "on" position without starting the vehicle. Repeat this process a number of times within a certain time frame, which is typically indicated by the door locks turning or an audible chime. Self-programming In modern cars the keyfob is equipped with an electronic chip that connects