This DELPHI Mass Air Flow (MAF) Sensor, part code AF10621-12B1, is engineered to precisely measure the amount of air entering the engine's intake manifold. Accurate air flow data is crucial for the engine control unit (ECU) to determine the correct amount of fuel to inject, thereby optimizing combustion. By ensuring the ECU receives precise air intake readings, this sensor contributes to improved engine performance, smoother idling, and better fuel economy. It is designed to meet or exceed original equipment specifications, guaranteeing a reliable and direct fit for compatible vehicles. Replacing a faulty MAF sensor can resolve issues such as poor acceleration, engine misfires, check engine lights, and increased fuel consumption. This DELPHI sensor offers a dependable solution to restore your vehicle's optimal air-fuel ratio and overall engine health.