I initially posted this in Tech/General Engine, but realized it should have been posted here.

I was replacing a windshield washer pump for the 2d time. (The first one quit after just a few months) and when I reconnected everything, I hit the button on the turn signal stalk to activate the windshield washer pump and the pump worked, but I heard a noise that wasn't good. I took the cover off and there were somethings broke off that shouldn't have been and a plastic piece caught in the plastic gears. I got the plastic out and the windshield wipers still work, however, the pump does not, nor does the intermittent wipers. What exactly does this thing do? I checked with my local parts store and they quoted me a price of $56 something to replace it, but they would have to order it. I put the cover back on. Is this something I really need? I've attached a couple of pictures.