1. DENSO
2. Hino Motors Manufacturing
3. Hitachi Astemo Chonburi Manufacturing
4. Honda Automobile
5. Isuzu Engine Manufacturing
6. Isuzu Motors
7. JTEKT ASIA PAIFIC
8. Kawasaki Motors Enterprise
9. Mitsubishi Motors
10. SIAM KUBOTA CORPORATION
11. T.RAD
12. TAIHO
13. Thai Arai
14. Thai Honda
15. Thai KOITO
16. Thai Suzuki Motor
17. Thai Yamaha Motor
18. TOYOTA DAIHATSU ENGINEERING& MANUFACTURING