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Key Programming Car Keys The majority of brick and mortar locksmiths and dealership parts departments have tools that can help you program replacement keys or restore the immobilizer's data. These tools are typically bidirectional OBD-II units. Insert a new key and switch it to the on position without triggering the engine. Repeat this process a few times over a predetermined time frame, which is usually indicated by the door locks turning or chiming. Self-programming I