Buy OEM 2001 Subaru Part # 45155XC00A. Radiator Cap. Cap Reserve Tank. Engine Coolant Expansion Tank A failed expansion tank can cause the cooling system in your 2001 Subaru

CAP-RESERVE TANK Radiator Cap

Fits Ascent, Legacy, Outback

Engine Coolant Expansion Tank
A failed expansion tank can cause the cooling system in your 2001 Subaru to leak antifreeze, or it can cause your engine to overheat. If you're losing coolant, contact our service department to avoid engine damage.