How to change spark plug on 02 mazda tribute - 2002 Mazda Tribute

Is it a V6? For a V6 if you are standing in front of the car it will be the middle cylinder on the firewall side of the engine. You will have to remove the plastic engine cover and the intake manifold to get to it. If it were on the front side of the engine you would only have to remove the plastic cover. Since there is a good bit of work involved removing the manifold, I would suggest that you go ahead and replace all of the sparkplugs and consider replacing the coil for the one cylinder also. I have a 2001 Mazda Tribute. Mine started running rough so I decided to replace all the sparkplugs. After replacing the sparkplugs it continued to run rough. I took it to a shop and got it scanned (no cost for the scan). The scan showed the coil on the 3rd cylinder was bad. So I wound up having to pull the manifold off again to replace the coil :(
The first time it took me 1-1/2 hours to do the plugs, second time 1 hour to do the coil. Car runs great after coil replacement. Hope this helps.