Buy 1999 Lexus RX 300 Coil Spring Insulator (Left, Right, Front, Lower). Suspension Coil Spring - Suspension, Make - OEM Lexus Part # 4815848011 (48158-48011, 4815848010, 4851049165, 4852049165)

FRONT COIL SPRING, LOWER LEFT; FRONT COIL SPRING, LOWER RIGHT.

INSULATOR, FRONT COIL SPRING, LOWER LH ABSORBER ASSY, SHOCK, FRONT LH ABSORBER ASSY, SHOCK, FRONT RH INSULATOR, FRONT COIL SPRING, LOWER RH

Fits RX 300

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 1999 Lexus RX 300 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.