The results show that: the CFP of vehicles’ control arm with quenched and tempered (QT) steel is treatment is 25% of all 14 manufacturing processes, demonstrating a high potential to reduce GHG; the CFP of vehicles’ control arm with CSC’s NQT steel is 5.26 kgCO2e/kg, saving heat treatment, transportation, and sand blasting operation with the benefit of 0.87 kgCO2e/kg, a 32% reduction compared to CSC’s rod and bar steel (2.70 kgCO2e/ kg); the quantitative benefit of NQT steel is verified by TÜV Rheinland.