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 525i: 2004, 2005, 2006, 2007, 2008, 2009, 2010] - [BMW 525xi: 2006, 2007] - [BMW 528i xDrive: 2009, 2010] - [BMW 528i: 2008, 2009, 2010] - [BMW 528xi: 2008] - [BMW 530i: 2004, 2005, 2006, 2007, 2008, 2009, 2010] - [BMW 530xi: 2006, 2007] - [BMW 535i xDrive: 2009, 2010] - [BMW 535i: 2008, 2009, 2010] - [BMW 535xi: 2008] - [BMW 545i: 2004, 2005, 2006] - [BMW 550i GT: 2010] - [BMW 550i: 2006, 2007, 2008, 2009, 2010] - [BMW 645Ci: 2004, 2005] - [BMW 650Ci: 2006, 2007, 2008, 2009, 2010] - [BMW 650i: 2006, 2007, 2008, 2009, 2010]