The 7th Annual Quest for Excellence, Automotive Industry's annual supplier survey, included 25 percent of its OEM readers to determine the best suppliers in more than 50 product categories. Johnson Controls placed at the top in five different product categories. Other suppliers who are the winners in multiple product categories include Bosch, Delphi, Denso, and TRW. Product categories in which Johnson Control is the winner include entertainment systems, instrument clusters, instrument panel, overhead systems, and seats. Delphi is the winner in product categories including cruise control systems, engine management systems, suspension, and telematic devices & systems.