Toyota Motor Thailand Co.,Ltd. AutoAlliance (Thailand) Co.,Ltd.(Ford and Mazda Joint Venture) Isuzu Motors Co.,(Thailand) Ltd. Thai Honda Manufacturing Co.,Ltd. Siam Toyota Manufacturing Co.,Ltd. Johnson Controls & Summit Interior Co.,Ltd. Dana Spicer (Thailand) Limited. Chevrolet Sales (Thailand) Ltd. Mitsubishi Motors (Thailand) Co.,Ltd. Isuzu Engine Manufacturing Co.,(Thailand)Ltd. Visteon (Thailand) Limited Thai Auto Works Co.,Ltd Naza Automotive Manufacturing Sdn Bhd (Malaysia) Nissan Power Train ZF Lemforder(Thailand) Co.,Ltd. SIAM NISSAN AUTOMOBILE CO.,LTD. BMW India PrivateLimited (India) Enkei Thai Co.,Ltd. TS-Tech (Thailand) Co.,Ltd. NHK Spring (Thailand) Co.,Ltd. Mercedes-Benz (Thailand) Ltd. Daikin Industries (Thailand) Ltd. Denso (Thailand) Co.,Ltd. Kawasaki Motors Enterprise(Thailand) Co.,Ltd. Yamaha Motor Vietnam Co.,Ltd Perodua Manufacturing Sdn Bhd (095999T) Nissan Motor(Thailand) Co.,Ltd. Inergy Automotive Systems (Thailand) Ltd. TCIE Vietnam Pte Ltd.part of Tan Chong Group Malaysia Ford Motor Company(Thailand) Limited General Motors Thailand. Thai Yamaha Motor Co.,Ltd. Summit Laemchabang Auto Seats Manufacturing Co.,Ltd. Honda Trading (Thailand) Co.,Ltd. Honda Automobile(Thailand) Co.,Ltd. Isuzu Autoparts Manufacturing Corporation. Yamaha Motor Phillippines.