This HELLA Mass Air Flow (MAF) Sensor, part number 8ET 358 166-601, is designed to accurately measure the amount of air entering your engine. By providing this critical data to the engine control unit (ECU), it enables precise fuel injection adjustments. Proper functioning of the MAF sensor is essential for maintaining optimal engine performance, smooth idling, and good fuel economy. A faulty sensor can lead to various drivability issues, including poor acceleration, increased fuel consumption, and engine warning lights. HELLA is a trusted brand known for its high-quality automotive components. This sensor is manufactured to meet stringent standards, ensuring reliable and long-lasting operation in your vehicle.