Genuine OEM Toyota Front Upper Coil Spring Insulator, part number 48157K0020. This component is positioned at the top of the front suspension coil spring, between the spring and the vehicle's chassis. Its function is to absorb shock, reduce noise and vibration, and ensure the spring is correctly seated. The material is designed to withstand the stresses of the suspension system. Genuine OEM parts provide the exact fit and material properties required for optimal suspension performance and ride comfort.