How to change spark plugs for 2000 mazda millinia?

which engine? 2.5 is straightforward. follow the ign wires to the plugs, and change each one. 2.3 is way different. it has a cop system. left bank is easy, pull the intercooler, pop off each coil, change plugs. right bank is a bear. i remove a lot more stuff than others to get at them, esp #5. egr valve, junction bracket by the solenoids, disconnect all the connectors. to get at the coil connector for #5, i pull the rear intercooler, which means pulling the battery, and moving a coupla wiring harness'. takes about 2 hours for the right bank, it can be done faster, but i take a lot of breaks. one caveat. get the correct spark plugs, or you get to do it all over again.