Genuine OEM Volkswagen Coolant Expansion Tank, part number 7P0121407B. This tank holds excess engine coolant, allowing for thermal expansion and contraction while maintaining proper system pressure. It is a critical component within the engine cooling system. Made from durable translucent plastic, it weighs approximately 1.05 kg. Choosing a genuine OEM expansion tank ensures correct fluid capacity, pressure relief valve calibration, and material compatibility for long-term reliability.

Catalogue entry: CONTAINER.