I replaced both the upper (broiler) and lower (baking) elements. The lower element had failed, but I figured I would replace them both since the unit is about 30 years old. Replacement is pretty simple as the new elements match exactly with the old ones. The toughest part is working around the oven door while it's open. I guess a person could remove the door, but that doesn't seem worth the effort. In any event, after an hour the removal and replacement was done. Tried it yesterday and it works fine.