The door of our Jenn-air wall oven would not fully close. The light would stay on, and we found the oven temp was inconsistent. To fix it, you will need these new hinges and probably hinge receptacle assemblies (a different part - number 74008015). You may get lucky and be able to fix your door with just new hinges, so maybe get the hinges first, and see if it fixes the problem. If it doesn't, then be prepared to order the receptacles.
Installing the hinges is easy. After you pull the door off the oven, put it on a flat surface and take the inside face off. You will need some screwdrivers to remove the screws. Be careful reinstalling the screws if you have not worked with sheet metal before. It is easy to over-tighten the screws and strip the treads. Just tighten them firmly, but don't go crazy.
Once you see the old hinges you will see why the new part is better--the spring is much longer and stronger.
The part is shipped with a small metal pin about 1/4 inch long that jams the hinges partway open. This makes it easier to hang the door. After you hang the door on the oven, you will need to remove these pins with pliers, or else the door won't fully close. If you ever have to pull the door off again, you will need to reinstall these pins, or else use a 6 penny nail to jam the door open.
One other point: these hinges are strong, so be careful working with them so you don't jam or pinch your fingers.