21501-9HA0A is a thermostat for the radiator inlet of the Nissan Teana with a three-way hose.

Thermostats are used to control the temperature of a heating or cooling system to suit the occupant's lifestyle. In addition to making the home more comfortable, a thermostat can help you save on your energy bill. From various models and technologies to extra features, read on to find the best thermostat for your home.