How do you change a Thermostat in a 2007 Mini Cooper S?

To change the thermostat in a 2007 Mini Cooper S, first, ensure the engine is cool and disconnect the battery. Remove the engine cover and drain the coolant. Next, locate the thermostat housing, detach the hoses, and unbolt the housing to access the thermostat. Replace the old thermostat with a new one, reassemble everything, refill the coolant, and reconnect the battery.