This HELLA Mass Air Flow (MAF) Sensor, part number 8ET 009 149-411, is designed to accurately measure the amount of air entering your engine. By providing this crucial data to the engine control unit (ECU), it enables precise fuel injection and ignition timing adjustments. Proper functioning of the MAF sensor is vital for maintaining optimal engine performance, improving fuel economy, and reducing emissions. A faulty MAF sensor can lead to various drivability issues, including rough idling, hesitation, stalling, and poor acceleration. HELLA is a trusted brand known for its high-quality automotive components. This sensor is manufactured to meet stringent industry standards, ensuring reliable and long-lasting performance for your vehicle.