Subaru OEM Aux Coolant Reservoir Cap

Subaru OEM Part Number 45137AE003

Maintain proper cooling-system pressure with a genuine Subaru OEM radiator cap. Subaru part number 45137AE003 is designed to seal the radiator or coolant reservoir assembly and maintain the correct operating pressure within the cooling system.

A worn or failing radiator cap can contribute to coolant loss, improper pressure regulation, overheating, or coolant being pushed out of the system. Replacing it with the correct OEM cap helps restore the factory sealing and pressure-control function.