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Key Programming Car Keys Most dealerships and brick and mortar locksmiths have tools to assist you in programming replacement keys or restore information from the immobilizer. These tools are usually bidirectional OBD-II devices. Insert a blank, new key and then turn the ignition to the "on" position, without starting the car. Repeat this process several times within a certain time period typically indicated by the door lock being on the move or chiming. Self-programming In modern vehicles, the keyfob contains a chip that communicates with your car. Both devices