Genuine OEM Audi Lower Coil Spring Insulator, part number 5Q0512297F. This rubber component is designed to sit at the bottom of the coil spring, providing insulation between the spring and its mounting point. Its primary function is to reduce noise, vibration, and harshness, contributing to a smoother ride and protecting suspension components from wear. This black rubber ring weighs 0.0828 kg. Using a genuine OEM insulator ensures the correct material composition and durometer, which are crucial for effective noise isolation and long-term durability within the suspension system.