In this study, the crack propagation of the automotive engineering component is investigated through experimental and simulation work on crankshaft of automotive component car named connecting rod. The experimental work is conducted at STRIDE, Kajang Malaysia, with the load of 106.707 kN by tensile testing using Instron machine. The Finite Element analysis of crack model of connecting rod is successfully developed. The stress intensity factor is successfully determined via experimental and simulation. Both experiment and simulation work are successfully validated and shows strong in agreement in term of location of crack, its propagation and its stress intensity factor.