Bosch Mass Airflow Sensor Bosch OE-quality Mass Air Flow Sensors measure the exact amount of air entering the engine to maintain the proper air-fuel mixture for optimal combustion. Built to original equipment specifications, they provide precise readings that allow the engine control unit to adjust fuel delivery accurately. This helps improve engine performance, enhance fuel efficiency, and reduce emissions. Durable construction ensures reliable operation, while fast response supports smooth acceleration and stable idle. Bosch mass air flow sensors help protect engine components and maintain consistent, long-lasting performance and drivability. Built to OE specification provides the correct function and calibration to ensure trouble-free operation. 100% new product; not re-manufactured or rebuilt Sensor and housing are calibrated and sold together ensuring precise sensor reading and optimal engine performance Guaranteed to match vehicle requirements for performance, drivability, fuel economy and emissions Can provide up to 20 percent better fuel consumption