Genuine OEM Audi Gearbox Oil Pressure Return Line, part number 8K0317818CS. This line is a critical component of the gearbox lubrication system, responsible for returning oil under pressure back to the reservoir. It ensures that the transmission components receive adequate lubrication and cooling. The line is precisely shaped to fit within the transmission assembly. Constructed from high-quality metal to withstand oil pressure and temperature. Genuine OEM parts are essential for transmission fluid lines to maintain correct fluid flow, prevent leaks, and ensure the longevity of the gearbox.