The article deals with suitability assessment of selected types of materials needed for the manufacture of plastic holder of parking sensor, which is located in the vehicle bumper. By applying the PTC Creo Mold Analysis simulation tool, the manufacturing process has been assessed to minimize potential errors affecting not only the appearance properties of the final part, but also its mechanical properties and, last but not least, the quality and success of the injection molding process. Application of computer simulation has verified the knowledge that decisive influence on mechanical and physical properties of the final part is in the selection of a suitable type of applied material as well as correct setting of technological parameters and, last but not least, the design of the mold itself.