Buy OEM 2003 Lexus Part # 4813178121 (48131-78121, 4813178120). Coil Spring (Left, Right, Front). Suspension Coil Spring - Repair or Replace Your coil springs are not especially prone to failure, but

FRONT COIL, LEFT; FRONT COIL, RIGHT.

Fits NX 200t, NX 300, NX 300h

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 2003 Lexus might benefit from replacing the strut springs. Excessive rust can make the springs more prone to failure. Contact your local Lexus service department to have your suspension system evaluated.