Genuine OEM Volkswagen Coolant Regulator Housing Cover, part number 057121483C. This cover is designed to protect the coolant regulator and seal its housing, preventing leaks and ingress of contaminants into the cooling system. It is typically found on the left side of the engine, enclosing the coolant regulator assembly. Constructed from durable metal and weighing approximately 0.09 kg, it measures 0.12m in length. A genuine OEM cover ensures a precise fit and proper sealing, critical for maintaining the integrity and efficiency of the engine's cooling system.