Plugs are standard copper type with recommended replacement at 32k. They will last longer than that but at 60+k its time for plugs. My '06 is coil on plug so wires aren't an issue. Not sure on the '05.

I'd replace the plugs and get the code read - Autozone or others can do it for free. If the code is "misfire" or something like that its probably the plugs.