This HELLA Mass Air Flow (MAF) Sensor, part number 8ET 358 166-611, is engineered to accurately measure the amount of air entering the engine's intake manifold. By providing this critical data to the engine control unit (ECU), it allows for precise adjustments to fuel injection and ignition timing. Proper functioning of the MAF sensor is essential for maintaining optimal engine performance, smooth idling, and efficient fuel consumption. A faulty sensor can lead to various issues, including poor acceleration, increased fuel usage, engine misfires, and illuminated check engine lights. HELLA is a trusted brand known for its high-quality automotive components. This sensor is designed to meet or exceed original equipment specifications, ensuring reliable and durable operation. Installation of this sensor will help restore your vehicle's performance and efficiency.