O ring set for engine cooling system quick connect hoses For BMW e83 X3 3.0i Si xDrive 28i 30i N52 N51 engines AUTOMATIC Or MANUAL The O rings for the quick connect hoses are not carried by dealers. In most leaking situations the hoses are perfectly fine, and the leak is caused by dry O rings, which can be replaced with this affordable set This set is made of NBR material (same material as the original ones) /////////////////////// Fits BMW Below: 2011 BMW X3 3.0si Sport Utility 4-Door 3.0L 2011 BMW X3 xDrive28i Sport Utility 4-Door 3.0L 2010 BMW X3 3.0si Sport Utility 4-Door 3.0L 2010 BMW X3 xDrive28i Sport Utility 4-Door 3.0L 2010 BMW X3 xDrive30i Sport Utility 4-Door 3.0L 2009 BMW X3 3.0si Sport Utility 4-Door 3.0L 2009 BMW X3 xDrive30i Sport Utility 4-Door 3.0L 2008 BMW X3 3.0i Sport Utility 4-Door 3.0L 2008 BMW X3 3.0si Sport Utility 4-Door 3.0L 2007 BMW X3 3.0si Sport Utility 4-Door 3.0L