Huffing and puffing won't unlock the door of a car secured by Huf North America Automotive Parts Manufacturing. A subsidiary of Germany-based Huf Hülsbeck & Fürst Gmbh & Co. KG, Huf supplies mechanical and electronic automobile locks and security systems. Its product lineup includes lock sets, steering locks, and remote control systems. Operating through three plants, in Tennessee, Wisconsin, and Michigan, the company develops its products in partnership with auto manufacturers such as Chrysler, General Motors, Audi, Porsche, Bentley, and its largest customer, Ford.