Parts for your 2015 Subaru Exiga-Thermostat

2015 Subaru Exiga thermostat — purpose, servicing and replacement

Based on Subaru’s factory service information (Exiga/Crossover 7 YA/YAM series Cooling System section), the Subaru Global Technical Information System (STIS) and dealer parts catalogues for 2015 Exiga variants (FB25 and EJ20 engines), the vehicle is fitted with a wax‑pellet engine coolant thermostat. It sits in the lower hose/water pump housing and is absolutely relevant to engine warm‑up and temperature control.

The thermostat’s job is simple but critical: help the engine reach operating temperature quickly, then hold it steady. When cold, it stays shut so coolant circulates within the block for a faster warm‑up, better fuel economy and a toasty heater. Once it’s at temp, it opens to let coolant flow through the radiator and shed heat. If it sticks shut, the Exiga can overheat