Tell us more. How is it failing? From external - like being hit from something? Internal corrosion? Leaking from the plastic or hose connections?
Things (off the top of my head) that can cause a radiator to fail.
Bad radiator cap - causing too much pressure in the radiator
Bad motor mounts - engine twisting causing undue pressure on the radiator
Bad radiator mounts - causing poor support of radiator
Incorrect coolant in radiator or additives
Once you tell us how why you are replacing the radiator, we might be able to help more.