Genuine OEM Audi Coolant Vent Line, part number 4G0121519A. This line is an integral part of the engine cooling system, designed to facilitate the venting of air or to connect auxiliary cooling components such as a transmission cooler or secondary radiator. It ensures proper coolant circulation and helps prevent air pockets that can hinder cooling efficiency. This line is typically made from durable, heat-resistant materials. It weighs approximately 0.04 kg. Choosing a genuine OEM coolant vent line guarantees precise routing, correct material specifications, and reliable connections for optimal cooling system performance and longevity.

Catalogue entry: LINE left outer.