O ring set for engine cooling system quick connect hoses For BMW e60 525i 528i 530i N51 N52 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 528i Base Sedan 4-Door 3.0L 2011 BMW 528i Lujo Sedan 4-Door 3.0L 2011 BMW 528i Lujo Sedan 4-Door 3.0L 2011 BMW 528i Top Sedan 4-Door 3.0L 2011 BMW 528i Top Sedan 4-Door 3.0L 2010 BMW 528i Base Sedan 4-Door 3.0L 2010 BMW 528i xDrive Base Sedan 4-Door 2009 BMW 528i Base Sedan 4-Door 3.0L 2009 BMW 528i xDrive Base Sedan 4-Door 3.0L 2008 BMW 528i Base Sedan 4-Door 3.0L 2007 BMW 530i Base Sedan 4-Door 3.0L 2007 BMW 530xi Base Sedan 4-Door 3.0L 2007 BMW 530xi Base Wagon 4-Door 3.0L 2006 BMW 525i Base Sedan 4-Door 2.5L USA Models 2006 BMW 525i Base Sedan 4-Door 3.0L USA Models 2006 BMW 525xi Base Sedan 4-Door 3.0L 2006 BMW 530i Base Sedan 4-Door 3.0L 2006 BMW 530xi Base Sedan 4-Door 3.0L 2006 BMW 530xi Base Wagon 4-Door 3.0L