The Bosch 0280218488 Mass Air Flow (MAF) Sensor is a precision-engineered hot film air mass meter designed to accurately measure the volume of air entering your engine. This critical sensor provides real-time airflow data to the engine control unit (ECU), enabling optimal fuel mixture calculations for improved performance, fuel efficiency, and reduced emissions. Key Features: Hot film sensing technology for precise air mass measurement Factory-calibrated sensor and housing sold as complete assembly 100% new OE-quality construction, not remanufactured Patented design with enhanced resistance to water and particulate damage Minimized sensor drift for long-term accuracy OE-identical connector ports for direct plug-and-play installation Reduced pressure drop design for optimal airflow Bosch is a global leader in mass air flow sensor technology and an original equipment manufacturer for numerous vehicle brands. This sensor replaces OEM part numbers including GM 21994504 and cross-references to aftermarket numbers MA1113, MA276, and MAS0276. Signs of a failing MAF sensor include rough idle, increased fuel consumption, elevated emissions, and poor drivability. The Bosch 0280218488 delivers reliable performance with precision calibration to restore proper engine management function.