Subaru OEM
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If you are experiencing strange overheating issues or see fluctuations on your temperature needle then a broken thermostat may be the culprit. A broken thermostat is certainly not uncommon because a stuck thermostat could prevent the coolant flow needed to properly cool to your engine or a stuck open thermostat could cause inconsistencies in your overall cooling function.
The Subaru OEM Thermostat is a factory component that is a direct replacement, and anytime you perform maintenance that requires draining your coolant, you should always consider replacing the thermostat as it is a cheap preventative maintenance measure.
