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The Mazda Tribute has 4 plugs (4-cylinder) The 3.0L V-6 has six plugs.
Screwed into the cylinder head.
The Mazda 5 does not have glow plugs. Maybe you meant spark plugs?
There are 6 plugs total three are at the front of the motor and are easy to get to the other 3 are at the back of the motor un the manifold.
Change the spark plugs and wires... Change the spark plugs and wires...
Generally I change platinum plugs at 100K and regular plugs at 50K.
BE MORE SPECIFIC. 4 or 6 cylinder?
Disconnect the battery, remove the intake manifold, remove the spark plug boot covers and cables, and remove the old spark plugs. Put in the new spark plugs, attach the spark plug boot covers and cables, replace the intake manifold and connect the battery.
There are plugs under the front seats for the air bag wiring. unplug then replug the wires and the light should go out. It worked on my 2002.
Change the plugs at 100,000 miles or earlier if the engine is not performing as it should.
A Mazda 6 s requires 6 plugs, A Mazda 6 i requires 4
The owners manual says every 75,000 miles