Genuine OEM Hyundai Oil Pump O-Ring, part number 261222U000. This O-ring is essential for sealing the oil pump assembly, preventing oil leaks and ensuring consistent engine lubrication. It is located at the base of the oil pump where it mounts to the engine. Genuine OEM O-rings are designed to withstand engine temperatures and oil exposure, providing a durable and leak-free seal critical for engine health.