What is this part?

[drfftn]

I was taking this piece off of my rack and pinion and the thing fell apart(yellow cap that has the number 4 on it)... anyone know where I get another?

http://i.imgur.com/K3Wxi7J.jpg

[derass]

It's a dust cover for the pinion gear. Just quickly checked online and it doesn't look like it's available from Nissan anymore.

[supersayianjim]

fak
.................................................. ..

[cotbu]

Fak what? if that picture is of yours, then it's in good condition. You could take it off epoxy it and put it back on.

I've seen them broken in half and I still was able to salvage them.