Genuine OEM Audi Seat Belt Adjustment Fitting, part number 4D0857833D. This essential component is part of the vehicle's passive safety system, enabling the precise height adjustment of the seat belt on the B-pillar. It ensures the seat belt is correctly positioned across the occupant's shoulder for optimal safety and comfort. Weighing 0.319 kg, this fitting is constructed from robust, high-strength metal to withstand significant forces during an impact. Choosing a genuine OEM adjustment fitting guarantees the correct dimensions, material strength, and reliable operation, which are paramount for maintaining the vehicle's safety standards and ensuring proper seat belt function.