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 Private
Limited (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.