Genuine OEM Volkswagen AdBlue Filler Pipe, part number 5QF131965C. This pipe assembly is designed to facilitate the refilling of the vehicle's AdBlue (Diesel Exhaust Fluid) tank, which is essential for the Selective Catalytic Reduction (SCR) system to reduce nitrogen oxide emissions. It connects the external filler neck to the AdBlue reservoir. Weighing approximately 0.411 kg and measuring 0.695 meters in length, this genuine OEM pipe ensures a leak-proof connection and proper routing, preventing spills and contamination of the AdBlue fluid, which is crucial for the effectiveness of the emissions system.