Genuine OEM Volkswagen Rear Coil Spring, part number 7N0511115C. This heavy-duty coiled spring is a fundamental component of the vehicle's rear suspension system. Its primary function is to absorb impacts from road irregularities, support the vehicle's static weight, and maintain proper ride height. Weighing approximately 2.95 kg and measuring 0.33 meters in length, its specific spring rate is crucial for balanced handling. Using a genuine OEM coil spring ensures the correct spring rate, material fatigue resistance, and precise dimensions, which are vital for maintaining designed ride quality, handling characteristics, and overall suspension longevity.