Where are the spark plugs on a 2005 Toyota Corolla CE?

The spark plugs are actually along the top side of the engine. They do not have external wires like some vehicles. First remove the dust cover. Next, there are 4 hex screws along the top of the head that reatin the spark plug casings. Remove these screws and twist out the spark plug connectors and change the plugs as normal. You will need a small flat head screw driver to undo the retaining clip for the electical connections. Be sure to use pre-spaced iridium plugs. you will need to remove the few bolts that hold down the cover for the wires to get to cylinders 3 and 4. 1 and 2 are okay to do without removing this, but remember to change the whole set of plugs. It is an east task.