Buy 1999 Lexus ES 300 Engine Coolant Reservoir Cap. Engine Coolant Expansion Tank - Repair or Replace Expansion, Cause - OEM Lexus Part # 1640550020 (16405-50020)

CAP SUB-ASSY, RESERVE TANK

Fits LX 470

Engine Coolant Expansion Tank - Repair or Replace
A failed expansion tank can cause the cooling system in your 1999 Lexus ES 300 to leak antifreeze, or it can cause your engine to overheat. If you're losing coolant, contact our service department to avoid engine damage.