Where are the spark plugs are on an 2003 Xterra?

Answer 1

the spark plugs are located in the top of the engine block. locate your spark plug wires, and follow them down into the holes for the plugs. there should be 3 on one side and 3 on the other, from front to back. they are recessed down in the top of the enigine, so a socket wrench with a long extension will be nessecary. the 6th plug on a 6 cyl engine is EXTREMELY difficult to change. it is in the very back of the engine, down about 14 inches or so from the top. you will not be able to see it without a mirror, as it is very close to the firewall and there is only a couple of inches of space to work with. i recommend haveing a professional do it. its woth the time and money. i recently changed the plugs in my '03 xterra and it took 3 hours. 30 min for the font 5, and 2 1/2 hours for that one plug in the back. it really is that hard to get to.