How do you change rear sparkplugs on 2001 infinity i30?

To change the rear spark plugs on a 2001 Infiniti I30, first disconnect the negative battery terminal for safety. Remove the engine cover if applicable, then access the rear spark plugs by removing any necessary components, such as the intake manifold or other obstructions. Use a spark plug socket and ratchet to carefully remove the old spark plugs, and then install the new ones, ensuring they are properly gapped. Reassemble any removed parts and reconnect the battery before starting the engine.