2017-2020 BMW 440i xDrive Base 3.0L 6 Cyl. Detailed Notes: Downstream O2 Oxygen Sensor for BMW 340i 2016-2018 440i 540i 740i X3 X4 L6 3.0L. Notes: Oxygen Sensor -- Downstream; Bank 1 Sensor 2. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table.
