This replacement engine coolant reservoir is manufactured from quality materials to withstand the stresses of underhood heat and engine vibration. It is engineered and manufactured to match the fit and function of the original part. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [BMW 540i: 1997, 1998, 1999, 2000, 2001, 2002, 2003] - [BMW 540it: 1999, 2000] - [BMW 740i: 1995, 1997, 1998, 1999, 2000, 2001] - [BMW 740iL: 1995, 1996, 1997, 1998, 1999, 2000, 2001] - [BMW 750iL: 1995, 1996, 1997, 1998, 1999, 2000, 2001] - [BMW 840Ci: 1994, 1995, 1996, 1997] - [BMW 850Ci: 1993, 1994, 1995, 1996, 1997] - [BMW 850CSi: 1994, 1995] - [BMW 850i: 1991, 1992] - [BMW Z8: 2003]