How do you change spark plugs on a Nissan Frontier 3.3l?

To change the spark plugs on a Nissan Frontier 3.3L, first, ensure the engine is cool and disconnect the negative battery terminal. Remove the ignition coil by unbolting it and disconnecting the electrical connector. Use a spark plug socket to carefully unscrew and remove the old spark plugs, then install the new plugs by hand to avoid cross-threading, followed by tightening them to the manufacturer's specifications. Finally, reconnect the ignition coils and the battery terminal.