Genuine OEM Audi Rear Axle Coil Spring, part number 8K0511115DJ. This essential suspension component is responsible for supporting the vehicle's weight and absorbing impacts from road irregularities, contributing significantly to ride comfort and stable handling. It is positioned on the rear axle. Made from high-strength steel, this coil spring weighs 1.952 kg. Installing a genuine OEM coil spring guarantees the correct spring rate, height, and material fatigue resistance, which are critical for maintaining the vehicle's designed ride quality, load-carrying capacity, and overall suspension integrity.