How do you replace spark plugs on a 2008 Kia Spectra?

To replace the spark plugs on a 2008 Kia Spectra, first ensure the engine is cool and disconnect the negative battery terminal. Remove the ignition coil pack by unscrewing it and pulling it out, then carefully detach the spark plug wire. Use a spark plug socket and ratchet to unscrew the old spark plugs, then install the new ones by hand to avoid cross-threading, followed by tightening them with the ratchet. Finally, reattach the ignition coil and battery terminal, and start the engine to ensure proper installation.