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The ERA 558174A Mass Air Flow (MAF) Sensor is a crucial component for modern engine management systems. It precisely measures the volume and density of air entering the engine, providing vital data to the engine control unit (ECU). This data allows the ECU to calculate the correct amount of fuel to inject for optimal combustion, leading to improved performance, fuel efficiency, and reduced emissions. The sensor is identified by its part code 558174A and carries the specific sensor designation 5WK97502Z, indicating its precise application and manufacturing standards. Designed as a direct replacement, this MAF sensor ensures seamless integration with compatible GM vehicle systems. Proper functioning of the MAF sensor is essential for maintaining engine health and preventing issues such as rough idling, poor acceleration, and check engine lights.