The objective of this work was to develop the simulation of the side impact against a pole in a hatchback vehicle using LS DYNA covering the main reinforcement of the side impact system for which the materials that make up the driver’s door and the elastomeric polymer to be used were analyzed. The mechanical properties of the materials were obtained by testing the specimens using the ISO 6892 standard. The accidents at the national level were studied,side crashes being the first cause with 27.42% which, through a non-probabilistic sampling and qualitative analysis, allows analyzing the range of vehicles circulating in the country, placing in the first place of units sold by the model in part of the year 2017 to the test vehicle 1, with 14.5%. Therefore, we analyzed the vehicle’s geometry, being the door a structure with wide gaps minimally reinforced, lodging the main reinforcement inside the door, which limits deformation, increases rigidity and distributes the energy in the event of a lateral collision. For the analysis of the simulations, the results produced by simulating the side impact with the side impact system of the vehicle and implementing the elastomeric polymer coating to the main reinforcement are compared by evaluating the sections described in the Spanish UNECE Regulation No. 95 Revision 02; which aims to safeguard the life of the occupants in case of a side impact. It is concluded that the implementation of the elastomeric polymer in the primary reinforcement presents a reduction in the deformation of the elements of the lateral structure of the vehicle,