Genuine OEM Audi Seat Belt Tensioner, part number 80A857620. This crucial safety component is engineered to rapidly tighten the seat belt during a collision, enhancing occupant protection. It is specifically designed for the front left seating position. Weighing approximately 0.46 kg and measuring 0.405 meters in length, this genuine OEM part ensures precise operation and seamless integration with the vehicle's safety systems, providing reliable performance.