How do you replace spark plugs on a 2005 subaru outback 2.5 xt?

To replace the spark plugs on a 2005 Subaru Outback 2.5 XT, first, disconnect the battery to ensure safety. Remove the engine cover and the ignition coil by unscrewing the bolts and gently pulling them out. Then, use a spark plug socket to unscrew the old spark plugs, and install the new ones, ensuring they are properly gapped to specifications. Finally, reassemble by replacing the ignition coils and engine cover, and reconnect the battery.