The DELPHI AF10311-12B1 Mass Air Flow (MAF) sensor is engineered to provide precise measurements of the air entering your engine. This critical data allows the engine control unit (ECU) to calculate the correct amount of fuel to inject, leading to improved fuel efficiency and reduced emissions. Designed as a direct replacement, this MAF sensor ensures seamless integration with your vehicle's existing air intake system. It meets or exceeds original equipment specifications for performance and durability, restoring your engine's optimal air-fuel ratio. Proper functioning of the MAF sensor is vital for smooth engine operation, consistent power delivery, and efficient combustion. A failing MAF sensor can lead to poor acceleration, rough idling, increased fuel consumption, and illuminated check engine lights.