Carcinogenic substances have been found in samples of cars parts, according to a study by an auto website and State broadcaster China Central Television.

Polycyclic aromatic hydrocarbons, or PAHs, which can cause cancer, were found in vehicles including the Chang'an Alsvin, the Mitsubishi Outlander, Hyundai's New Santa Fe and the Chevrolet Aveo, said Xiu Yu, general manager of auto website Chewen.

Xiu said his website had received reports from car users complaining of unpleasant odors in their cars, and some people even felt dizzy after driving for a long time.