This HELLA Mass Air Flow (MAF) Sensor, part number 8ET 009 149-191, is engineered to accurately measure the amount of air entering your engine's intake manifold. This critical data allows the engine control unit (ECU) to determine the correct amount of fuel to inject, optimizing combustion. Proper functioning of the MAF sensor is vital for maintaining smooth engine operation, consistent power delivery, and good fuel economy. A faulty sensor can lead to various issues, including rough idling, poor acceleration, increased fuel consumption, 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, providing a reliable replacement for your vehicle's original part.