Where is the thermostat on a 94 mx3 v6?

The thermostat on a 1994 Mazda MX-3 V6 is located on the engine, at the lower end of the radiator hose connection to the engine. It's not readily visible without some work, likely requiring removing some plastic engine covers or shrouding to get a clear view. You'll be looking for a housing where the lower radiator hose attaches to the engine block. The thermostat itself is inside that housing.