if a 4 cylinder ,locate thermostat housing, remove 2 nuts holding coil on, then remove 2 bolts holding housing on, t-stat is in housing

Where the upper radiator hose connects to the engine you will find the thermostat housing. Under that housing is the thermostat. Usually has 2 bolts holding it on.

Where the upper radiator hose connects to the engine you will find the thermostat housing. Under that housing is the thermostat. Usually has 2 bolts holding it on.

The thermostat housing on the 1998 Mazda 626 6 cylinder is located underneath the air filter housing. You need to remove this air filter housing to get to the thermostat housing. There's two (2) bolts the left connecting the thermostat housing to the motor and another two (2) bolts facing the steering wheel connecting it to the engine. This is where the thermostat is housed.

For the 2.7l engine, the thermostat housing is all one piece. The housing is located under the alternator and attached to the engine block.

Between the 2 back wheels , in the center (differential housing) where the drive gears are