Genuine OEM Volkswagen Engine Thermostat, part number 03C121110L. This essential component precisely regulates the engine coolant temperature, allowing the engine to reach and maintain its optimal operating temperature for efficiency and reduced emissions. The thermostat includes the main wax-pellet and spring mechanism along with a separate sealing O-ring. Weighing 0.087 kg, this part is engineered for accurate temperature response. Choosing a genuine OEM thermostat ensures precise calibration and reliable operation, which is critical for preventing engine overheating or undercooling and maintaining fuel economy.

Catalogue entry: COOLANT RG 80C-95C.