Genuine OEM Volkswagen Glow Plug with Pressure Sensor, part number 04L905061C. This advanced component plays a dual role: it preheats the combustion chamber to aid in cold starting diesel engines and accurately monitors cylinder pressure for optimal engine management. It is typically threaded into the cylinder head, directly exposed to the combustion chamber. Measuring approximately 0.165 meters in length, this plug integrates both heating and sensing elements into a single robust unit. Choosing a genuine OEM glow plug with a pressure sensor ensures precise heating characteristics, accurate pressure readings, and seamless integration with the engine's control unit for efficient and reliable engine operation.