Where are the spark plugs on a 2004 Chrysler 300?

The spark plugs on a 2004 Chrysler 300 (assuming the 3.5L V6 engine, as that was the most common engine) are located on the top of the engine, underneath the plastic engine cover. To access them, you'll need to remove that cover. They are arranged in a V-shape, following the layout of the V6 cylinders.

However, it's crucial to consult a repair manual specific to your 2004 Chrysler 300's engine (3.5L V6 or the less common 5.7L Hemi V8). The manual will provide precise diagrams showing the location of each spark plug and the proper procedure for removal and replacement. Improper removal can damage the spark plug wells or the threads.