BMW X6 2008 -2009 (AT), xDrive50i (4.4L, twin turbo, center), main, rear. BMW X6 2010 -2011 (AT), Base, 8 cylinder (xDrive50i, 4.4L, twin turbo), main, rear. BMW X6 2012 -2014 (AT), (gasoline), 8 cylinder (xDrive50i, 4.4L, twin turbo), main, rear.