Buy 2011 Toyota Tundra 5.7L i-Force V8 FLEX A/T RWD SR5 Extended Cab Pickup Fleetside Engine Coolant LITER, Tank, Expansion - OEM Toyota Part # 1640520090 (16405-20090)

Cap SUB - Assembly, RESERV. Cap, Tank. Engine Coolant Reservoir Cap.
A cover that prevents foreign debris from entering the container. Included with: Reservoir.

Engine Coolant Reservoir Cap

Fits Highlander

2.4 LITER. 3.3 LITER.
Engine Coolant Expansion Tank - Repair or Replace
A failed expansion tank can cause the cooling system in your 2011 Toyota Tundra to leak antifreeze, or it can cause your engine to overheat. If you're losing coolant, contact our service department to avoid engine damage.