That is a freeze plug and it is there to pop out when the engine freezes so that the engine block does not crack.
I KNOW FOR THE 1990 IT IS TOWARD THE BOTTOM OF THE ENGINE BELOW THE ALT.
on bottom of engine toward the passenger side
Bottom of engine, toward the front, right side of car.
On drivers side of radiator toward engine about 3 inches from bottom.
Remove 2 bolts in front on the bottom of the engine cover. Remove 2 Phillips bolts in the ash tray area. and lastly there are two latches toward the back of the cover....one on each side. You then pull the bottom of the engine cover toward the rear and tilt the top out slowly. It's easy.
engine side of radiator, toward the bottom, drivers side.
the same place that it is on most engines, bottom of the engine, toward the rear, bottom of the oil pan.
Its located on the drivers side engine panel toward the bottom its very difficult to get to.
It is on the bottom of the engine toward the front end of the car. If you crawl under the front of the car it is pretty easy to find.
Yes, located toward the bottom ot the engine at the end of the crankshaft. Mazda used an integrated harmonic balancer/belt pulley.
Mounted on the bottom of the engine block, inside the oil pan.Mounted on the bottom of the engine block, inside the oil pan.
Up under the car look at the exhaust pipe. Starting from the engine, follow the exhaust pipe toward the rear of the vehicle, there will be a wire plugged in to a sensor in the pipe, before the catalytic converter, and another wire plugged in to another sensor in the pipe, AFTER the catalytic converter.