Volkswagen Touran Thermostat B44DF-87-M100 Cooling Core Replacement Stable Temperature Control

When your Touran’s engine coolant temperature gauge needle fluctuates frequently, or the warm air output temperature is erratic or unstable, or there are coolant leaks, this usually indicates aging of the wax pellet inside the thermostat or valve sticking, making precise control of coolant flow impossible. The thermostat normally adjusts coolant flow through the radiator according to water temperature to keep the engine at its optimal operating temperature range, preventing excessive fuel consumption and wear due to overheating or overcooling. This item OEM number B44DF-87, suitable for Volkswagen Touran as a cooling core replacement part. During installation, be sure to drain old coolant, check the sealing ring, and tighten according to factory standard to prevent leaks.