The customer is always right at Nissan Technical Center North America (NTCNA). The company is part of Nissan North America's operations, and its mission is to combine engineering, design, and technology to create Nissan and Infiniti cars specifically for the North American market. Engineers at NTCNA design and test vehicle systems including body, chassis, electrical, exterior trim, heating, ventilating, and air conditioning, emmissions, and safety. The company also oversees Nissan's North American research and development operations in Michigan as well as those at Nissan operations in California, Ohio, and Tennessee. Additionally, NTCNA has a proving ground testing track outside Phoenix.