How do you change thermostat in Subaru legacy?

To change the thermostat in a Subaru Legacy, start by ensuring the engine is cool and disconnect the negative battery terminal. Drain the coolant and remove any components obstructing access to the thermostat, typically located near the engine block. Remove the thermostat housing bolts, take out the old thermostat, clean the mating surfaces, and install the new thermostat along with a new gasket. Finally, reassemble everything, refill the coolant, and check for leaks.