One Year Unlimited Mileage Quality Guarantee Before buying, check the [amazonconfirmedfit] check (Make, model, year, engine, Note,The engine and Note in particular) at the top of the link to see if your car can be used. 2PCS; Upstream + Downstream Fit 2016-2018 BMW 340i 3.0L; Fit 2017-2019 BMW 340i GT xDrive 3.0L; Fit 2016-2018 BMW 340i xDrive 3.0L; Fit 2017-2020 BMW 440i 3.0L; Fit 2017-2020 BMW 440i Gran Coupe 3.0L; Fit 2017-2020 BMW 440i xDrive 3.0L; Fit 2017-2020 BMW 440i xDrive Gran Coupe 3.0L; Fit 2017-2020 BMW 540i 3.0L; Fit 2017-2020 BMW 540i xDrive 3.0L; Fit 2018-2019 BMW 640i xDrive Gran Turismo 3.0L; Fit 2016-2020 BMW 740i 3.0L; Fit 2017-2020 BMW740i xDrive 3.0L; Fit 2017-2021 BMW M240i 3.0L; Fit 2017-2020 BMW M240i xDrive 3.0L; Fit 2018-2019 BMW X3 3.0L;