If it’s a Reese, Andersen, or a Curt it should be replaced before you even open the box.
If it’s a B&W it’s good till infinity. When society ends there will be only a few relics of humanity...The great Pyramids and all the B&W hitches. I mean, come on, they have their own fan club and everything.
In seriousness, I would not replace the hitch, I would maintain it...replace the springs and jaws if needed. These pieces of equipment are expensive and should only be replaced by want or by need.
Thanks!
Jeremiah