Information?? High quality chassis partseries products. Made with high strength steel tubing for superior strength and durability. Stable performance, reliable quality and long service life Uniform thickness, no blow holes, slag, cracks, tearing, or incomplete fusion. Measured by specialized inspection tools after welding to make sure assemble hole , bushings insert, and installation sizes are proper. Professional InstallerisHighly Recommended(No Instruction Included) Alignment Highly Recommended After InstallCompatibility Chart?? For 2017 BMW X5 (ATC45L, 2.0L ( 40eX ) For 2018 BMW X6 (ATC45L), 3.0L ( turbo ) For 2017 BMW X5 (ATC45L, 3.0L, gasoline) For 2012-2017 BMW X3 (AT), (ATC 45L) For 2015-2018 BMW X4 (AT), (ATC 45L) For 2015-2017 BMW X6 6 cylinder (3.0L, turbo), (ATC45L) For 2014-2016 BMW X5 3.0L, gasoline (ATC 45L) For 2014-2016 BMW X5 3.0L, diesel (ATC 45L) For 2016 BMW X5 2.0L (40eX) For 2017 BMW X5 (ATC45L, 3.0L, diesel)Package Content?? 1 x Transfer Case Assembly