This part says it's non-returnable. What if I get it and it's defective?

We guarantee that it will work, either because (a) it is brand new, or (b) if it is a used part, it was tested before being put into stock.

This part says it's non-returnable. What if I get it and it's defective?

We guarantee that it will work, either because (a) it is brand new, or (b) if it is a used part, it was tested before being put into stock.