Currently, personal transportation media, i.e., car, has become popular in the world and Vietnam. Most of car owners intendedly close windows to further prevent an infiltration of toxic substances from ambient environment; therefore, an air circulation system becomes dominant inevitably. Again this background, this study involving the computational fluid dynamics (CFD) technique to computationally predict the distribution of airflow patterns and temperature in the cabin at fan speed of 1, 2 and 3 m/s for set up temperature at 15, 20 and 25oC. The simulation results show the mostly distribution of supplied air around driver and front passenger of cabin, and the upward direction was also observed. The temperature results indicate the warm air appeared in the front seat as a consequence of solar radiation effects, while the cooler air was recorded in the back seat. These results imply the adjustment of air–conditioning function can affect the thermal comfort of passengers in the cabin.