REPLACEMENT PVC HOSES Kit - the PCV allows pressurized gases to vent from the crankcase and PCV hoses transport these gases in the system. COMPATIBLE WITH - BMW 550i 12-17; 550iX 11-17; 650i 650iX 11-19; 750i 750iX 750Li 750LiX 11-15; Alpina B6 14-15; Alpina B7 B7LX B7X 12-15, B7L 13-15 REPLACES PART #'s - BMW 8647299 11158647299 11157601453 11158635843 EMH286 OEM FIT, FORM & FUNCTION - We used premium materials for a long service life and can guarantee proper fit and performance TWO YEAR WARRANTY - Every new part is free from defects under normal use for two years from the purchase or 24,000 miles Proper crankcase ventilation is key to smooth performance and engine longevity. The Positive Crankcase Ventilation System (PCV) allows gases to escape the crankcase in a controlled manner. The PCV hose transports these gases in the system and should be inspected or replaced at each recommended technical inspection. This positive crankcase ventilation hose is a direct replacement for a worn or leaking original equipment hose This PCV hose is designed to withstand extreme underhood temperatures and engine oil vapors to resist cracking and leaking 550i 2012-2017 4.4L 550iX 2011-2017 4.4L 650i 2011-2019 4.4L 650iX 2011-2019 4.4L 750i 2011-2015 4.4L 750iX 2011-2015 4.4L 750Li 2011-2015 4.4L 750LiX 2011-2015 4.4L Alpina B6 2014-2015 4.4L Alpina B7 2012-2015 4.4L Alpina B7L 2013-2015 4.4L Alpina B7LX 2012-2015 4.4L Alpina B7X 2012-2015 4.4L 11158647961, 11158637873, 11157640285, 11157622488, 11157601451, 11157601452 and 8647299 11158647299 11157601453 11158635843 EMH286