Genuine OEM Audi Rear Left Seat Belt Buckle, part number 4N0857739MNB. This critical safety component is designed to securely latch the seat belt, ensuring proper restraint for occupants. It is positioned on the rear left side of the vehicle, integrating with the seat assembly. Weighing approximately 0.316 kg, it is constructed for durability and consistent performance. Choosing a genuine OEM seat belt buckle ensures factory-specified strength, precise latching mechanism, and proper integration with the vehicle's safety systems for maximum occupant protection.