Does this need to be Replaced?

Mr. Sinister said
Have you put one on and driven it? Try it even if its for ***** n giggles......

Sure. Driven lots. Both ways.
The one from this car is out in the shop. I'll put it on and see!

My question stands, though. Is it possible to not need one?

But for the OP, I stand corrected! For your car, clean it up and re-install it!