Shop OEM Hyundai Motor Group Part # 5464138000 (54641 38000, 54641-38000). Coil Spring Insulator (Front, Upper). Optima. Sonata. XG300, XG350. Suspension Coil Spring - Repair or Replace Your coil springs are

Spring. Pad. Seat. Insulator.
Coil Spring Insulator.. Coil. Rubber seal.

Coil Spring Insulator

Fits Optima, Sonata, XG300, XG350

Optima. Sonata. XG300, XG350.
Suspension Coil Spring - Repair or Replace
Your coil springs are not especially prone to failure, but if they have been cut, clamped, or heated to have the vehicle lowered, your might benefit from replacing the strut springs. Excessive rust can make the springs more prone to failure. Contact your local service department to have your suspension system evaluated.