This DELPHI Air Mass Flow (MAF) Sensor, part number AF10420-12B1, is designed to accurately measure the volume and density of air entering your vehicle's engine. By providing this critical data to the engine control unit (ECU), it enables precise fuel injection and ignition timing adjustments. Proper functioning of the MAF sensor is essential for maintaining engine efficiency, reducing emissions, and ensuring smooth acceleration. A faulty sensor can lead to poor fuel economy, rough idling, hesitation, and illuminated check engine lights. Trust DELPHI's commitment to quality and precision engineering for a reliable replacement that restores your engine's performance and drivability. This sensor is built to meet or exceed original equipment specifications.