How do you change the spark plugs of a 2001 hyundai sonata (4cylinders)?

remove the plastic head cover, there will be 4 wires gently tug to get them to release from the spark plug. Now you need tools, there is a spark plug accessory that comes with most automotive tool kits. it looks like a deep well 19mm but has a rubber o-ring that keeps the plug in the socket till you get it out of the head. You will need a 4 inch extension as well. Im not sure what type of plugs Hundai requires but NGK's are the best you can put in a jap car.