The Bosch 0280218205 Mass Air Flow (MAF) Sensor accurately measures the volume of air entering the engine, allowing the engine control unit (ECU) to adjust fuel delivery for efficient combustion. This 100% new sensor is not remanufactured, ensuring the highest quality and longest service life. Key Features: Patented hot film design increases robustness against water and particulate damage while reducing sensor drift and lowering pressure drop Sensing elements are paired and calibrated with the housing on the production line to ensure precise operation OE technology provides the correct function and calibration for trouble-free operation and emissions compliance Ensures low levels of harmful emissions with greater fuel efficiency (up to 20% better) and improved engine performance OE-identical connector ports and attachment points for exact fit and simple installation Important Installation Note: Bosch HFM MAF sensors are calibrated with the housing and should never be replaced with the sensor element only unless recommended by the vehicle manufacturer. Bosch units come packaged as a complete unit to ensure optimal performance. This sensor replaces OEM part number 13627542418. Common symptoms of a failing MAF sensor include rough idle, poor fuel economy, engine hesitation, increased emissions, and check engine light illumination.