Genuine OEM Audi Coolant Expansion Tank, part number 4N0121405AF. This essential component manages the volume of engine coolant, accommodating thermal expansion and maintaining optimal system pressure within the cooling system. It is typically located in the engine bay, connected to the radiator and other cooling circuit components. Designed for durability and resistance to high temperatures and corrosive coolants, it ensures reliable long-term performance. Using a genuine OEM expansion tank guarantees precise fitment, correct fluid capacity, and proper integration with the vehicle's cooling system, preventing leaks and ensuring efficient engine temperature regulation.

Catalogue entry: CONTAINER.