Buy 2015 Lexus GS 350 CAP; CAP SUB-ASSEMBLY. Engine Coolant Expansion Tank - Repair or Replace A Losing, Avoid - OEM Lexus Part # 1640531140 (16405-31140, 1640531110)

RESERVE TANK.

CAP, RESERVE TANK CAP SUB-ASSY, RESERVE TANK

Fits GS 250, GS 350, RC 200t, RC 300, RC 350

Engine Coolant Expansion Tank - Repair or Replace
A failed expansion tank can cause the cooling system in your 2015 Lexus GS 350 to leak antifreeze, or it can cause your engine to overheat. If you're losing coolant, contact our service department to avoid engine damage.