1 Set Oil Pump Drive Chain Kit W Tensioner Guide Rails Crank Gear For 2012 2016 228I 528I 428I 320I X1 X3 X4 X5 Z4 N20 N26 This oil pump drive chain kit is designed for precise fit and performance.It includes one oil pump chain, one crank gear, one counter balance shaft sprocket, and tensioner guide rails, providing all key components needed for the oil pump drive system.The parts are constructed from metal materials to support consistent and compatibility with a range of models including 228I, 528I, 428I, 320I, X1, X3, X4, X5, Z4, N20, and N26 from model years 2012 to 2016.Each part is engineered to meet specifications for integration with existing engine components, supporting efficient oil pump drive function.The design emphasizes straightforward installation and dependable performance, contributing to overall engine functionality and.