For ensuring of the efficient operation of tractors in agriculture, there is a need of the information on failures of aggregates and systems. In the agricultural production of Russia, serial tractors are operated in various production and climatic conditions, the specifics of failures in specific regions are of particular interest. Kirovets tractors are the most common in the agro- industrial complex of the Novosibirsk region. (Research purpose) The research purpose is to collect and analyze statistical data on failures of Kirovets tractors operated in agricultural production in the Novosibirsk region. (Materials and methods) Failures of Kirovets tractors were logged at the place of appearance and operating time of the tractor for three years. The sample consists of 129 tractors. The data obtained were processed by mathematical statistics methods. (Results and discussion) Forty one percent of failures occur in the operating time interval of up to 500 moto-hours. The maximum number of failures accounted for the chassis, 37 percent, and transmission units, 32 percent. Forty six percent of failures are caused by violation of operating rules, 8 by climatic factors, 46 percent by insufficient quality of the tractor itself. (Conclusions) The article describes a certain specificity of failures of the studied tractors in the conditions of the Novosibirsk region. The main reason for failures is the low quality of assembly and the use of substandard materials in production. The article recommends for improving of the reliability of the Kirovets tractor to develop proposals to adjust the frequency and content of maintenance, taking into account regional specifics. The manufacturer needs to pay more attention to the quality control of the assemblies and components and the incoming quality control of materials used in the production of the tractor.