Easy job for the 90 to 100 k service. NGK Plugs are the OEM Laser Iridium a set runs under 40$. Tools need 10 mm Socket and rachet, Long extension, 5/8 Plug Socket. Silicone grease for plug wite boot and top connection.
KIA RIO SPARK PLUGS
For my grandchildren for learning - Hands & Minds
The old site is located http://homeskillold.skidome.org/