Genuine OEM Audi Rear Battery Box Cap, part number 1K6801498. This molded foam piece serves as a protective cap or cover for the battery box, typically located in the rear of the vehicle. It is designed to insulate the battery, protect it from physical damage, and help secure it in place. Made from lightweight expanded polystyrene (EPS) foam, it weighs approximately 0.035 kg. Using a genuine OEM cap ensures precise fitment and proper insulation, maintaining the battery's optimal operating conditions and preventing movement.