In global competitive Environment demand of automotive industry and demand for automotive parts of the vehicle is increasing day by day for the fulfillment of customer need. The selection of suitable material plays an important role in product development for customer satisfaction. Due to wrong selection of material, increase the cost of the product as well as product failure. A better method is more important for selection of material. Due to increasing scenario in the manufacturing of automotive parts, there should be the selection of best material for manufacturing of automotive parts. In this present work, there is a selection of Mg Alloy in the automobile industry. For the proper selection of Mg alloy a TOPSIS, COPRAS, MOORA, ELECTRE and SAW Method is applied and then finally ranked the best magnesium alloy. In this proposed research work, five Method is compromised and select the best Mg alloy