In recent years, the automotive industry has been developing lightweight components in order to comply with stricter fuel consumption regulations. In fact, car mass reduction plays an important role to reduce fuel consumption and CO2 emissions. Materials such as Advanced High Strength Steels (AHSS), aluminium, magnesium, polymers and fibre-reinforced composites have the potential to reduce current vehicle mass by replacing traditional steel components, while ensuring safety requirements and structure reliability. Particularly, the composite materials are the most promising because of their high specific strength, although they have the drawback of having high cost and low recyclability. This thesis work aims to develop an LS-Dyna FEM model in order to carry out safety test simulations on an automotive seat and then assess the structural practicability of using a more sustainable material, the basalt reinforced-fibre polymer (BFRP), as a replacement of the original material, the glass reinforced-fibre polymer (GFRP).