Genuine OEM Audi Spare Tire Hold-Down Knob, part number 8W9863695A. This component is designed to securely fasten the spare tire in its designated compartment, typically in the trunk. It threads onto a mounting bolt, providing firm support to prevent the spare tire from shifting or rattling during vehicle operation. The knob features an ergonomic design for easy hand-tightening. Made from durable plastic, it is built to withstand the forces of vehicle movement. Using a genuine OEM hold-down knob ensures a precise fit with the mounting bolt and reliable retention of the spare tire, contributing to cargo area safety and preventing damage.