This kit includes all 5 PCV components that commonly fail.Replaces part numbers:11617501566 Crankcase Pressure Regulator Valve11617504535 Upper Oil Separator Vent Tube11617504536 Crankcase Vent Return Pipe11611432559 Crankcase Ventilation Hose (Oil separator to valve cover)11157532649 Crankcase Ventilation Hose (Oil separator to dipstick tube)Fits the following models:2000-2005 320i Sedan 1999-2001 323Ci Convertible1998-2001 323Ci Coupe1997-2001 323i Sedan1998-2001 323i Wagon2000-2007 325Ci Convertible2000-2006 325Ci Coupe2000-2005 325i Sedan2000-2005 325i Wagon2000-2005 325xi Sedan2000-2005 325xi Wagon1998-2000 328Ci Coupe1997-2000 328i Sedan1999-2007 330Ci Convertible1999-2006 330Ci Coupe1999-2005 330i Sedan1999-2005 330xi Sedan2000-2004 525i Sedan2000-2003 525i Wagon2002-2005 525i Sedan1995-2001 528i Sedan1998-2001 528i Wagon2000-2003 530i Sedan2002-2005 530i Sedan2003-2007 X3 2.5i2003-2007 X3 3.0i1998-2001 Z3 2.5 Convertible2000-2002 Z3 2.5i Convertible1996-2000 Z3 2.8 Convertible1998-2000 Z3 2.8 Coupe1999-2002 Z3 3.0i Convertible1999-2002 Z3 3.0i Coupe2002-2006 Z4 2.5i Convertible2002-2006 Z4 3.0i ConvertibleThis is a compatible replacement part manufactured by AA Ignition. This PCV hose kit is NOT a genuine OEM part. Vehicle makes and their associated vehicle models are registered trademarks of their respective owners. These trademarks and part numbers are used in this listing only to identify the vehicles this PCV hose kit fits. AA Ignition is a registered trade mark of GWA Auto Parts Inc.