Buy OEM 2003 Mazda Part # ZL0115355A (ZL01-15-355A). Engine Coolant Reservoir Cap. 1.6 LITER, Gendai Gousei. 1.8 LITER, Gendai Gousei. Protege; Gendai. Engine Coolant Expansion Tank -

Cap, SUB TA. Engine Coolant Reservoir Cap.
A cover that prevents foreign debris from entering the container. Part included in Reservoir assembly.

Engine Coolant Reservoir Cap

Fits Protege

1.6 LITER, Gendai Gousei. 1.8 LITER, Gendai Gousei. Protege; Gendai.
Engine Coolant Expansion Tank - Repair or Replace
A failed expansion tank can cause the cooling system in your 2003 Mazda to leak antifreeze, or it can cause your engine to overheat. If you're losing coolant, contact our service department to avoid engine damage.