Genuine OEM Jaguar Rear Upper Spring Isolator, part number C2S12151. This essential suspension component provides a cushioned seat for the coil spring, absorbing vibrations and reducing noise transmission from the suspension to the chassis. It is installed in the upper position of the rear suspension assembly, directly supporting the spring. Made from a durable, resilient orange polymer material, it weighs approximately 0.078 kg. Using a genuine OEM spring isolator ensures proper spring seating, optimal vibration damping, and long-lasting performance, crucial for maintaining ride comfort and suspension integrity.