Oil Pump Guide Rail Drive Chain Kit designed for N55B30A engine applications.This kit includes one oil pump guide rail assembly, three oil pump gears, one oil pump chain, and one tensioner.It is engineered to match the specifications for precise fitment on engines requiring the version with tensioner, OE number 11417618941.This assembly is compatible with a range of models equipped with the N55 engine, including variants designated as 135i, 335i, 435i, 535i, 640i, and 740i, produced within various date ranges from 2006 through 2019.Applications span multiple body styles such as coupes, convertibles, sedans, touring, gran turismo, gran coupe, and models like X3, X4, X5, and X6.The kit supports both standard and xDrive configurations, as well as hybrid variants where applicable.Specific compatibility covers production periods from 09/2006 onward, with detailed model and engine code alignment required for accurate fitment verification.