Genuine OEM Nissan Injection Pump Timing Gear, part number 1680300QAB. This gear is a critical component of the engine's fuel injection system, responsible for driving the injection pump at the correct speed and timing. It is located within the engine's timing mechanism. Precision-engineered with hardened teeth for durability and accurate meshing with other timing components, ensuring precise fuel delivery. Genuine OEM timing gears are vital for maintaining the correct ignition and fuel injection timing, which is essential for engine efficiency, power, and emissions control.