Genuine OEM Volkswagen AdBlue Cap, part number 2E0201553C. This cap is designed to securely seal the AdBlue (Diesel Exhaust Fluid) filler neck, preventing contamination, spillage, and evaporation of the fluid. It is located on the AdBlue tank's filler neck. Weighing 0.0252 kg, this cap is manufactured from durable materials to withstand environmental exposure and chemical contact. Choosing a genuine OEM AdBlue cap ensures a perfect seal and proper pressure regulation within the AdBlue system, which is crucial for the correct operation of the vehicle's emissions control system.