The mass air flow sensor without housing is a direct replacement for select 2016-2021 BMW applications. It measures the volume of air entering the engine so the engine computer can match fuel delivery to airflow; it installs into the existing housing.

Walker Products 245-1641 Mass Air Flow Sensor Features:

• Fits 2016-2018 BMW 330e, 340i, 340i xDrive; 2016-2019 BMW 330i, 750Li, 750Li xDrive, 750i, 750i xDrive; 2016-2021 BMW 740i
• Fits 2017-2020 BMW 120i, 420i, 430i Gran Coupe, 430i xDrive Gran Coupe, 440i, 440i Gran Coupe, 440i xDrive, 440i xDrive Gran Coupe
• Also fits select BMW applications
• Male oblong electrical connector with 4 blade terminals
• 2 mounting holes
• Mounting hardware and housing not included