This HELLA Mass Air Flow (MAF) Sensor, part number 8ET 358 166-661, is designed to accurately measure the amount of air entering the engine's intake manifold. This data is crucial for the engine control unit (ECU) to determine the correct amount of fuel to inject, ensuring optimal combustion. By providing precise airflow readings, this MAF sensor helps maintain consistent engine performance, improve throttle response, and reduce emissions. Its high-quality construction ensures durability and reliable operation under various driving conditions. Proper functioning of the MAF sensor is essential for a healthy engine. A faulty sensor can lead to issues such as rough idling, poor acceleration, increased fuel consumption, and the illumination of the check engine light.