Genuine OEM Volkswagen Coolant Expansion Tank, part number 7H0121407C. This vital component is responsible for holding excess engine coolant, allowing for the thermal expansion and contraction of the coolant as the engine heats up and cools down. It also provides a reservoir for topping up the cooling system. Constructed from durable, translucent plastic, it weighs approximately 0.451 kg. Using a genuine OEM expansion tank ensures proper fitment, material integrity, and resistance to temperature fluctuations and chemical degradation, which are critical for maintaining engine cooling system reliability.

Catalogue entry: CONTAINER.