The Bosch 0280218108 Mass Air Flow (MAF) Sensor delivers OE technology engineered to provide the correct function and calibration for trouble-free operation and emission compliance. This hot film MAF sensor is precision-calibrated with its housing as a complete assembly, ensuring accurate air mass measurements critical for optimal engine performance and fuel efficiency. Key Features: Hot film sensor technology for precise air mass measurement OE-quality design ensures proper engine calibration and emission compliance Factory-calibrated with housing for accurate readings Direct-fit replacement for specific vehicle applications Engineered to meet or exceed original equipment specifications Important Installation Note: Bosch hot film MAF sensors are calibrated as a complete unit with the housing. Always replace the entire sensor assembly unless the vehicle manufacturer specifically recommends replacing the sensor element only. Installing the sensor element separately may result in incorrect air mass readings and engine performance issues. This genuine Bosch MAF sensor restores proper air-fuel mixture control, helping to maintain smooth idle, responsive acceleration, and optimal fuel economy while keeping your vehicle compliant with emissions standards.