O ring set for engine cooling system quick connect hoses For BMW e53 X5 M62 4.4, 4.6iS engine 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: 1999–2003 BMW X5 (E53) X5 4.4i 2002–2003 BMW X5 (E53) X5 4.6is