This DELPHI Mass Air Flow (MAF) Sensor, part number AF10505-12B1, is engineered to accurately measure the volume and density of air entering the engine's intake system. By providing precise data to the engine control unit (ECU), it allows for the correct calculation of fuel injection, leading to improved fuel efficiency and reduced emissions. Proper functioning of the MAF sensor is crucial for maintaining engine performance. A faulty sensor can lead to issues such as rough idling, hesitation during acceleration, poor fuel economy, and illuminated check engine lights. This DELPHI sensor is designed to meet or exceed original equipment specifications, ensuring reliable and consistent performance. Installation of this sensor will help restore your vehicle's intended performance and drivability. It is a direct fit replacement for the original part, simplifying the repair process. Trust DELPHI for quality components that keep your engine running smoothly.