Vehicles, as an important factor in road traffic safety, are being improved more and more every day so that their technical system functions reliably and safely during their exploitation. During its working life, this technical system loses its original characteristics and there are certain deviations from the permitted limits. In Croatia, almost every fourth vehicle does not pass technical inspection, and the age of the fleet exceeds 14 years. According to all statistical data, the main cause of traffic accidents is the driver, while the vehicle, due to its technical defects, is the cause of accidents in the percentage of 0,2 %. When we compare this with the data in the European Union, in which it is proven that the vehicle is the cause of traffic accidents in the percentage of 6-8 %, and taking into consideration that many vehicles annually in Croatia do not meet the conditions of technical inspection, it is possible to assume that the number of traffic accidents caused by the vehicle larger. This paper is analyzing the correlation between the consequences of traffic accidents and the power of the vehicle, the technical condition of the vehicle, and the age of the vehicle. The main goal is to see the influence of these vehicle characteristics on the occurrence of traffic accidents, the consequences of traffic accidents, and traffic safety as a whole.