This HELLA Mass Air Flow (MAF) Sensor, part number 8ET 009 142-861, is designed to accurately measure the amount of air entering the engine's intake manifold. This critical data allows the engine control unit (ECU) to determine the correct amount of fuel to inject for optimal combustion. By providing precise airflow readings, this MAF sensor helps maintain consistent engine performance, improves throttle response, and contributes to better fuel economy. It is engineered to meet or exceed original equipment specifications for reliable operation. Proper functioning of the MAF sensor is essential for reducing emissions and preventing issues such as rough idling, stalling, or poor acceleration. Replacing a faulty sensor with this high-quality HELLA unit can restore your vehicle's performance and efficiency.