Genuine OEM Toyota Oil Pump Sprocket, part number 1351925010. This sprocket is a critical component of the engine's lubrication system, responsible for driving the oil pump. It ensures that oil is circulated throughout the engine to reduce friction and dissipate heat. This part is located on the crankshaft and engages with the oil pump drive mechanism. Genuine OEM parts are manufactured to the exact tolerances required for reliable engine operation and longevity.