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Most of automotive rubber components are subjected to static and dynamic loadings in services. To prevent failures during operation is one of the critical issues in rubber component design, Therefore, failure analysis and lifetime evaluation are very important in design procedure to assure the safety and reliability of automotive rubber component. Fatigue life prediction methodology of vulcanized natural rubber was proposed by incorporating the finite element analysis and fatigue damage parameter determined from fatigue test. In this study, by using the parameter of maximum Green-Lagrange strains and strain energy density appearing at the critical location. We can prove the relations between fatigue life and maximum Green-Lagrange strain or strain energy density, and the correlations between test piece and bench test of actual rubber component. Predicted fatigue lives of the rubber component agreed fairly well with the experimental fatigue lives.