Buy 2011 Mazda 6 Cap. Radiator. Reservoir. 2.5 LITER, 2009-2010. 3.0 LITER. 3.7 LITER, 2009-2010. 3.7 LITER, Cooling, Engine - OEM Mazda Part # AJ5715205 (AJ57-15-205)

A cover that prevents foreign debris from entering the container. Location-Reservoir. Radiator Cap. Engine Coolant. Included with: Reservoir.

Radiator CapEngine Coolant Reservoir Cap

Fits 6

2.5 LITER, 2009-2010. 3.0 LITER. 3.7 LITER, 2009-2010. 3.7 LITER, 2011-13. EXPANSION TANK CAP; Mazda6. Mazda6. Mazda6; 3.0L.
Engine Coolant Expansion Tank - Repair or Replace
A failed expansion tank can cause the cooling system in your 2011 Mazda 6 to leak antifreeze, or it can cause your engine to overheat. If you're losing coolant, contact our service department to avoid engine damage.