Volkswagen Polo/Magotan/B50 Coolant Temperature Sensor 06A919501 Original Plug Plug and Play

If your vehicle experiences cold-start difficulties, unstable idle, abnormal fuel consumption, or long-term low water temperature gauge readings with fans cycling aggressively, the engine coolant temperature sensor may be aging or failing. This sensor monitors coolant temperature in real time and feeds data to the engine control unit to precisely control fuel injection, ignition timing, and cooling fan operation, ensuring the engine runs at optimal temperature. OEM number: 06A919501. Fits VW Polo, Magotan, and Bestune B50; uses OE-style connector for plug-and-play installation. When installing, first drain some coolant to avoid scalding, and apply sealant to the sensor threads to prevent leaks.