Genuine OEM Audi Charcoal Canister, part number 8K0201799AD. This vital component of the evaporative emissions control system is designed to absorb fuel vapors that evaporate from the fuel tank, preventing their release into the atmosphere. It is typically located under the vehicle, integrated with the fuel system and connected by various hoses. Weighing approximately 1.043 kg and measuring 0.28m x 0.23m x 0.16m, it is built to precise specifications. Using a genuine OEM charcoal canister ensures effective vapor absorption and proper system function, which is crucial for maintaining environmental compliance and preventing issues like check engine lights.