Buy Lexus IS 350 CAP SUB-ASSEMBLY, RESERVE TANK. Engine Coolant Expansion Tank - Repair or Replace A Engine, Expansion, Cause - OEM Lexus Part # 1640531040 (16405-31040)

CAP SUB-ASSY, RESERVE TANK

Fits IS 350 (2006 - 2013)

Engine Coolant Expansion Tank - Repair or Replace
A failed expansion tank can cause the cooling system in your Lexus IS 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.