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The Mass Air Flow (MAF) sensor is responsible for metering the amount of air that enters the engine, and is critical for proper fueling levels. A bad MAF sensor can result in a rich or lean condition that can at best make the car run bad, and at worst could do serious damage to the engine.
Fits all 2008-2014 Subaru WRX and 2008-2021 WRX STI.
