Thailand: On-Road Vehicles and Engines
Vehicle emission standards in Thailand are developed by the Thai Industrial Standards Institute (TISI), an agancy within the Ministry of Industry, and the Pollution Control Department (PCD), an agancy of the Ministry of Natural Resources and Environment.
Thai emission regulations are based on European emission standards and test procedures. The regulations are published as Thai Industrial Standards (TIS).
Emission standards for light-duty vehicles—passenger cars and light commercial vehicles—are summarized in Table 1. The dates are applicable for new types, all types must comply one year later. Emission standards for heavy-duty truck and bus engines are summarized in Table 2.
| Date | EU Reference Standard | Thai Standard |
|---|---|---|
| 1997 | Euro 1 | TIS 1440-2540 gasoline TIS 1435-2540 diesel |
| 1999 | Euro 2 | TIS 1870-2542 gasoline TIS 1870-2542 diesel |
| 2006 | Euro 3a | TSI 2160-2546 gasoline TSI 2155-2546 diesel |
| 2012 | Euro 4b | TIS 2540-2554 gasoline TIS 2550-2554 diesel |
| 2024 | Euro 5 (CI) | TIS 3018-2563 diesel |
| 2025 | Euro 6 (SI) | TIS 3017-2563 gasoline |
|
a Without EOBD b With EOBD, without in-use conformity | ||
| Date | EU Reference Standard | Thai Standard |
|---|---|---|
| 1998.05 | Euro I | |
| 2000.05 | Euro II | TIS 1295-1998 |
| 2008.01 | Euro III | TIS 2315-2550 |
| 2012.01 | Euro IV | TIS 2315-2551 |
| 2024.01 | Euro V | TIS 3043-2563 gasoline TIS 3046-2563 diesel |