The use of plastics in rail vehicles has been state of the art for many years. Here too, 3D printing is becoming increasingly important for component production. 3D-printed plastic components are used for both the exterior and interior of rail vehicles. In addition to its use in new vehicles, additive manufacturing also plays its strengths in the production of spare parts. Here, components can be produced cost-effectively in small and medium quantities, and in some cases only 3D printing makes it possible to replace components.