Genuine OEM Volkswagen Carbon Canister, part number 1HM201801B. This reservoir, also known as a charcoal canister, is a key component of the evaporative emission control (EVAP) system. It stores fuel vapors from the fuel tank, preventing their release into the atmosphere until they can be safely purged into the engine for combustion. Weighing 0.508 kg, it is designed for efficient vapor absorption. Using a genuine OEM carbon canister ensures proper filtration capacity and system integration, crucial for meeting emission standards and maintaining fuel system integrity.