Where are the spark plugs on a dodge caliber?

The spark plugs on a Dodge Caliber are located on top of the engine, under the plastic engine cover. To access them, you'll need to remove the engine cover. They're generally arranged in a fairly straightforward manner, but the exact location relative to other components might vary slightly depending on the engine (2.0L or 2.4L). A repair manual specific to your Caliber's year and engine size would give you the most precise location and instructions.