This work deals with the definition of a methodology used to set up a component lifing monitoring on race car. In order to provide the vehicle in every moment of is track side activities the design level of reliability, it is necessary that the prescribed maintenance strategy is fully respected: from this observation, the need of a precise and clear monitoring of component age and lifing status emerges. In this context, after an introduction regarding the project among which this work had been developed, a discussion regarding the most relevant and useful concepts from the reliability engineering theory is presented, together with the presentation of the predefined maintenance program.