where is my spark plugs located. i beleive they need to be changed on 2002 Mazda 626

my diagnostic codes are po304 and po316.

4 answers
misfire could be cause by several issue not only plugs seek a diag and est as not to waste $
SAVE YOURSELF THE HEADACHE AND LET A MECHANIC DO THIS ONE. CAUSE IF YOU DON'T KNOW WHERE THE PLUGS ARE YOU SHOULD NOT TRY TO CHANGE THEM!
Please post returned codes , after spark plug replacement.
Your spark plugs are located under the ignition wire on both sides of the engine...they should be fairly easy to replace.