Component fatigue life is determined mainly by the load, material, design and manufacturing. Thus for an existing automobile, load plays a vital role. Wheel force transducer (WFT) is usually used to measure the external load of the vehicle.Strain gauge, force transducer, and accelerometer are used for measuring the component local load. With the load spectrum,material properties and geometry model, multibody dynamics, finite element method, Manson–Coffin equation can be used for the simulation and prediction of the fatigue life[4–7]