Ryans Automotive Service Center is a professional certified full service facility located in Fairfield, CA. We specialize in diagnostic work, preventative auto maintenance, car service, diesel service and car repair. Here at Ryans Automotive we can handle everything from a simple oil change to highly complex electrical or computer work, as well as heavy- duty work such as engine or transmission replacement. We are using the most sophisticated computers and equipment available in the automotive industry today. We are a qualified smog, brake, lamp, inspection facility.