Where are the spark plugs on a 2007 sonata?

On a 2007 Hyundai Sonata, the spark plugs are located under the engine cover on the top of the engine. For the 2.4L engine, you'll find them on the cylinder head, accessible by removing the ignition coil packs. If you have the 3.3L V6 engine, the spark plugs are also situated on the cylinder heads, but they will require a bit more effort to reach due to the engine layout. Always consult your owner's manual for specific details related to your model.