Where are the spark plugs on a 2003 Lexus gs300?

On a 2003 Lexus GS300, the spark plugs are located under the engine cover, which must be removed to access them. They are positioned in the cylinder head, with one spark plug per cylinder. The GS300 is equipped with a 3.0L inline-six engine, so there are a total of six spark plugs to replace if necessary.