The Bosch 0280218009 Mass Air Flow (MAF) Sensor is an original equipment quality sensor designed to measure the amount of air entering the engine and transmit precise data to the engine control unit (ECU) for optimal air/fuel ratio control. This sensor ensures low levels of harmful emissions with greater fuel efficiency and improved engine performance. Key Features: 100% new construction - not remanufactured - ensuring highest quality and longest life Patented design that increases robustness against water and particulate damage, reduces sensor drift, and lowers pressure drop Complete unit with sensing elements paired and calibrated with housing on the production line to ensure precise operation OE experience and superior technology provides correct function and calibration to match vehicle requirements Plug-in sensor design for straightforward installation OE identical connector ports and attachment points ensure exact fit A failing mass air flow sensor can cause rough idle, increased fuel consumption, elevated emissions, and poor drivability. Replacing a defective MAF sensor with this genuine Bosch unit restores proper engine operation and fuel efficiency. Cross-references to OEM part number 99660612400.