How do you change spark plugs on a 2005 Subaru Forester 2.5 xt?

To change the spark plugs on a 2005 Subaru Forester 2.5 XT, first, ensure the engine is cool and disconnect the negative battery terminal. Remove the engine cover and then the ignition coil by unbolting it and disconnecting the electrical connector. Use a spark plug socket to carefully unscrew the old spark plugs, then install the new ones with the correct torque specifications. Reassemble by reversing the disassembly steps, reconnecting the ignition coils and battery terminal.