The Bosch 028021808P Mass Air Flow Sensor is a premium OE-quality replacement sensor designed to deliver precise air flow measurement for optimal engine performance and fuel efficiency. As a global leader in mass air flow technology, Bosch manufactures this sensor to exacting standards with paired and calibrated sensing elements to ensure accurate operation. Key Features: Complete mass air flow sensor assembly with paired and calibrated sensing elements Hot-film technology measures air intake with precision for optimal air-fuel ratio Ensures lower harmful emissions and improved fuel economy Original Equipment quality from a trusted OEM manufacturer Direct-fit replacement designed for reliable, long-lasting performance This MAF sensor works by measuring the amount of air entering the engine, sending critical data to the engine control module to precisely match fuel injection for maximum power and efficiency. Cross-references with OEM part numbers 077133471K and 077133471KX. Replacing a faulty MAF sensor can resolve issues such as rough idle, excessive fuel consumption, increased emissions, and poor drivability.