The Bosch 0280218433 Hot Film Air Mass Meter is an original equipment quality sensor designed to accurately measure intake air mass entering the engine. This precision-engineered sensor provides the engine control unit with critical real-time data needed to optimize fuel injection, improve combustion efficiency, and maintain proper engine performance. Key Features: Complete factory-calibrated unit with sensing elements paired to housing for precise operation Hot film technology measures air mass via heated sensor membrane and temperature differential Integrated electronic module with ASIC digital signal processing for accurate calculations 9-pin electrical connector for direct plug-and-play installation OEM quality construction from Bosch, a leading original equipment manufacturer Helps restore proper idle, fuel economy, and drivability when replacing failed sensor Specifications: Bosch Part Number: 0280218433 Sensor Type: Hot Film Air Mass Meter (HFM-7-IPH) Pin Configuration: 9-pin connector Housing Material: Plastic and metal construction OEM Cross-References: GM 12671625, 13432261, 0836030, 55498433 Bosch mass air flow sensors are engineered as complete replacement units, not just sensing elements, ensuring reliable repair the first time. Signs of a failing MAF sensor include rough idle, increased fuel consumption, elevated emissions, and poor drivability. This sensor provides the accurate airflow data needed for optimal air-fuel ratio management across all engine operating conditions.