This engine crankcase breather hose check valve is designed to match the fit and function of the original valve on specified vehicles, and is engineered for durability and reliable performance. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [BMW 320i: 2001, 2002, 2003, 2004, 2005] - [BMW 323Ci: 2000] - [BMW 323i: 1999, 2000] - [BMW 325Ci: 2001, 2002, 2003, 2004, 2005, 2006] - [BMW 325i: 2001, 2002, 2003, 2004, 2005] - [BMW 325xi: 2001, 2002, 2003, 2004, 2005] - [BMW 328Ci: 2000] - [BMW 328i: 1999, 2000] - [BMW 328iC: 1999] - [BMW 330Ci: 2001, 2002, 2003, 2004, 2005, 2006] - [BMW 330i: 2001, 2002, 2003, 2004, 2005] - [BMW 330xi: 2001, 2002, 2003, 2004, 2005] - [BMW 525i: 2001, 2002, 2003, 2004, 2005] - [BMW 530i: 2001, 2002, 2003, 2004, 2005] - [BMW X3: 2004, 2005, 2006] - [BMW X5: 2001, 2002, 2003, 2004, 2005, 2006] - [BMW Z3: 1999, 2000, 2001, 2002] - [BMW Z4: 2003, 2004, 2005]