The aim of the proposed thesis is to redesign an automotive component in Additive Manufacturing (AM) and polymeric composite material, who historically was produced with the traditional subtractive process and aluminium alloy. This work can be defined a challenge, due to the characteristics of component which is taken in account. It was initiated with a review of additive manufacturing process and technology, with particular attention to the application in automotive field. An accurate research has been carried out on additive manufacturing technology for composite materials, with focus on Fused Deposition Modeling (FDM) and Selective Laser Sintering (SLS), and on composite materials able to withstands high loads applied at reaction rod.