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The aim of this paper is to present a methodology for approval of component that is applied when the first version is tested on a durability track with closed circuit and fails without meeting the approval criteria previously established. This approach was applied in suspension support on commercial vehicles. The full commercial vehicle was modeled in finite element for stress analysis in frame torsional loading. By presenting stress regions near the material's limit, tests were made on durability track with deformation measurement at the main critical spots. The component has failed in one of the measured spot without reaching the established number of laps for component approval on track. With the deformation measurement signal for one lap at the failure spot, a fatigue analysis using the software FEMFAT strain ® has been made, correlating the obtained damage with the number of laps on track until component failure.