ACDelco 12721126 GM OE Mass Air Flow Sensor Assembly

The ACDelco 12721126 is a GM Original Equipment Mass Air Flow (MAF) Sensor Assembly designed as a direct-fit replacement for GM vehicles. As a critical component of the engine management system, this sensor precisely measures the volume and density of air entering the engine, enabling the Engine Control Module (ECM) to calculate and deliver the correct fuel injection quantity.

Key Features:

• GM Original Equipment (OE) part — manufactured to the same specifications as the factory-installed component
• Measures incoming air mass so the ECM can optimize the air/fuel mixture for maximum efficiency
• Helps maintain peak fuel economy, engine power output, and throttle response
• Contributes to reduced harmful exhaust emissions by ensuring a precise air/fuel ratio
• Direct OEM replacement — no modifications required for installation
• Built to GM's standards for fit, form, and function, ensuring OE-level durability and service life

The ACDelco 12721126 Mass Air Flow Sensor Assembly is the recommended replacement part for maintaining the performance and reliability of your GM vehicle's engine management system. Replacing a faulty MAF sensor can resolve symptoms such as rough idle, poor fuel economy, hesitation on acceleration, and check engine light illumination.