During vehicle maintenance some components, such as motor oil and filters are replaced when certain period of time has passed or mileage reached. Braking system components which are subject to friction and wearout have to replaced when certain minimal thickness is reached. Manufacturer of vehicle provides information about initial and minimal size of braking components. It is a rare situation if the brake pads or discs are found at minimal thickness during inspection at scheduled maintenance. In the real aftersales workshop conditions mechanic have to evaluate condition of the brake pads and discs and determinate whenever to propose replacement of either component. Dynamics of wear of brake components on vehicle differ from front or rear axle and inner or outer pad. Correct prediction of service life can reduce maintenance costs and probability of unexpected vehicle breakdown. Service life of the brake components depend on many conditions, such as vehicle model, type of road, style of driving etc. The road conditions in Latvia differ from other European countries with high ratio of unpaved roads. Some of the vehicles sold in Latvia has maximum maintenance periodicity up to 40 000km but brake pads are wearing out at 30 000 km. Therefore correct model of prediction of brake component wear for local conditions can only be based on data collected from local data sources. Paper presents model of service life of brake components for 3 different types vehicles manufactured by the French automobile producer Renault. Model is based on regression analysis of data collected at workshops of manufacturer’s official dealerships. Samples were selected from vehicles belonging to randomly chosen owners to include most of population.