The Bosch Mass Air Flow (MAF) sensor with housing measures the volume and density of air entering the engine. It sends this data to the engine control unit (ECU). The ECU uses it to calculate the right amount of fuel for each combustion cycle. Also called an air flow meter or MAF sensor assembly, it helps the engine deliver smooth performance, good fuel economy and low emissions. Key Features: Complete assembly with housing: The sensor comes mounted in its housing, which simplifies installation. Accurate air measurement: Precise readings help the ECU keep the air-fuel ratio correct under all driving conditions. OE-level quality: Bosch is a leading original equipment supplier of engine management components. It engineers its sensors to meet demanding standards for durability and signal accuracy. Built for reliability: The sensor is designed to withstand engine bay heat, vibration and contaminants. Symptoms of a failing MAF sensor include a rough idle, hesitation, poor fuel economy, stalling and a check engine light. A new Bosch MAF sensor can restore proper air metering and engine response. Choose the specific part number that matches your application.