That's actually a pretty hard question to answer.
So much of the strength comes from how it's modeled and what settings are used to print it. Even a 10 degree celsius difference in extruder temperature can mean the difference between a strong part and one that crumbles.
Assuming the part was printed well, I'm estimating an ABS printed part has 90% the strength of an ABS molded part. Knowing that, when I redraw parts like this, I always try to consider how I will be printing it, and if I need to add any other structural enhancements to it.
The way this specific original part failed, I'm wanting to add some extra reinforcement around the area it failed at, hopefully preventing it from happening again.
Another example is the long tube that comes up off the center of the part. The wall on that is only 0.7mm thick, and my extruder diameter is 0.4mm. When the printer lays down a layer, it usually squishes out a bead of filament that is 0.6mm wide. What I will do for this model is force it to extrude 0.7mm wide, giving me the wall thickness I want with one "pass" around the circle. That will also force it to "squish" the filament harder into the layer below it, hopefully making it strong enough.
It also comes down to material choice. PLA filament would probably snap right off, but ABS has more "give" to it, so it will be able to bend a little without snapping.
That's one reason I offered to do it for free, because I'm also not sure the new part will hold up. I'm gonna send him a couple to test, and we can go from there.
Sorry the answer got so long, but I enjoy talking about this stuff.