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Combustion engines are responsible for toxic volatile compounds emission – especially carcinogenic and mutagenic aromatic hydrocarbons. The paper presents results of computational fluid dynamics methods application in modeling of air flow and pollutant distribution inside chosen vehicles cabin. Vehicle cabin geometry and ventilation sets are main factors determined car user exposure on VOCs which are conducted to the interior from outside, especially in road congestion situations. The modeling research was based on boundary conditions set according to the results of real engine tests and simulation of road congestion conditions. The analysis of modeling results show that even slight modifications of cabin geometry change area of toxins concentration in car cabin, what can be helpful in VOCs exposure prevention.