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With Continuous increase in demand to reduce weight is forcing Automotive Designers towards finding ways to explore new materials for the Engine components. Currently, Aluminum, Thermoplastics and Composites are widely used in Engine application. This paper examines the potential of a Magnesium alloy Front Cover designed to replace the Cast iron Front Cover in a Light duty Diesel engine. In presented study, a Cast iron Engine front cover is re-designed for Magnesium alloy and components developed. Further Magnesium alloy component tested at vehicle level and it has been demonstrated that a magnesium alloy Front cover can achieve key functional requirements such as Structural durability, Sealing, NVH, while providing substantial Weight saving.