Genuine OEM Nissan Oil Seal, part number 321135WK0A. This seal is designed to prevent oil from leaking out of the front of the gearbox. It is a critical component for maintaining proper lubrication within the transmission assembly. This part is located at the front of the gearbox. Genuine OEM seals are manufactured to precise tolerances to ensure a perfect fit and reliable sealing performance, preventing premature wear and leaks.