Genuine OEM Audi Activated Charcoal Container, part number 4F0201803F. This essential component of the evaporative emissions system captures and stores fuel vapors from the fuel tank, preventing their release into the atmosphere. The activated charcoal within the container adsorbs these vapors until the engine is running, at which point they are purged and burned. This container weighs 0.825 kg. Opting for a genuine OEM activated charcoal container ensures proper vapor adsorption capacity, correct system integration, and compliance with emissions regulations.