| DENSO (THAILAND) CO.,LTD. |
| SIAM AISIN CO.,LTD. |
| MURAKAMI MANUFACTURING (THAILAND) CO.,LTD. |
| HITACHI CHEMICAL AUTOMOTIVE PRODUCTS (THAILAND) CO.,LTD. |
| JTEKT (THAILAND) CO., LTD. |
| HONDA LOCK THAI CO., LTD. |
| OMRON AUTOMOTIVE ELECTRONICS Co., Ltd. |
| THAI KOITO COMPANY LIMITED |
| MITSUBISHI ELECTRIC CONSUMER PRODUCTS (THAILAND) CO., LTD. |
| PANASONIC AUTOMOTIVE SYSTEMS ASIA PACIFIC CO.,LTD. |
| AMPAS INDUSTRIES CO., LTD. |
| THAI ARROW PRODUCTS CO.,LTD. |
| YAMADA SOMBOON Co., Ltd. |
| NIKON CORPORATION |
| JVCKENWOOD Corporation |
| Johnson Controls, K.K. |
