1. ASIAN HONDA MOTOR CO., LTD.
2. ASTEMO CHONBURI MANUFACTURING LTD.
3. ASTEMO KORAT BRAKE SYSTEMS LTD.
4. DELTA ELECTRONICS (THAILAND) PUBLIC COMPANY LIMITED
5. HONDA TRADING ASIA CO., LTD.
6. ISUZU MOTORS COMPANY (THAILAND) LIMITED
7. JTEKT (THAILAND) COMPANY LIMITED
8. JTEKT AUTOMOTIVE (THAILAND) CO., LTD
9. KAWASAKI MOTORS ENTERPRISE (THAILAND) CO., LTD.
10. MAHLE SIAM FILTER SYSTEMS CO., LTD.
11. MITSUBISHI MOTORS (THAILAND) CO., LTD.
12. SIAM KUBOTA CORPORATION CO.,LTD.
13. SIAM TOYOTA MANUFACTURING CO., LTD.
14. TAIHO [THAILAND] COMPANY LIMITED
15. THAI HONDA CO., LTD.
16. THAI KOITO CO., LTD.
17. THAI SUZUKI MOTOR COMPANY LIMITED
18. TOYOTA DAIHATSU ENGINEERING& MANUFACTURING
19. TOYOTA MOTOR ASIA (THAILAND) CO., LTD.
20. UNIVANCE (THAILAND) COMPANY LIMITED.