Media lines that are both curved and partially integrated in other functional parts are to be found in virtually all sectors of industry in addition to the automotive sector This wide variety of applications and requirements calls for different production techniques. Conventional processes such as extrusion, blow moulding and 3D blow moulding frequently entail a number of different process steps. The fluid injection technique (FIT) constitutes an attractive alternative. FIT media lines used in series. applications in the automotive industry show that a new field of application could become established for the FIT here.