The Bosch 0280218109 is a hot film mass air flow (MAF) sensor that delivers OE technology for precise air measurement in your vehicle's intake system. This sensor provides accurate function and calibration to ensure trouble-free operation and emissions compliance. Key Features: Hot film MAF sensor technology for precise air flow measurement Includes complete housing assembly—sensor is pre-calibrated with housing OE-quality construction ensures proper function and emissions compliance Direct replacement for original equipment Designed to meet or exceed OEM specifications Important Installation Note: This sensor is calibrated as a complete assembly with the housing. Always replace the entire unit unless the vehicle manufacturer specifically recommends sensor-only replacement. Installing just the sensor element can result in inaccurate readings and engine performance issues. Bosch is a trusted original equipment manufacturer and aftermarket supplier of automotive sensors, delivering the quality and precision that professional technicians and DIY enthusiasts rely on.