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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 units. Insert an additional key and turn it to the off position without triggering the engine. Repeat this process a few times within a specified time frame typically identified by the door locks being on the move or chiming. Self-programming In modern vehicles keys, they contain an electronic chip that connects