To make light vehicles such as cars fuel-efficient, which in turn cars make economical, the vehicle should have a lighter weight. The composite materials are lightweight with extra strength as well as stiffness; the replacement of FRP composite materials to conventional metal (SM45C) materials applied in automotive car components can cut back the weight and enhance the mechanical properties of those components. This task deals with the power shaft of MARUTI OMNI to design the shaft for its minimal dimensions and fulfil modern-day disadvantages with specification then replace traditional metallic material with Carbon/Epoxy FRP composite material. Then a component version created for individual dimensions in CATIA V5R19 software. As soon as modeling, Torsional buckling evaluation and Modal analysis could be carried out for propeller shafts the use of ANSYS R14.5 to validate the theoretical calculations and analytical outcomes. The received outcomes are compared and Carbon/Epoxy Fiber Reinforced Polymer composite material is selected as a better alternative material for normal steel material in terms of many mechanical properties for light motor cars.