Outer Limits 4x4 Board

I have a 91 ln106 hilux and was looking at installing a snorkel and found a large crack under the guard/engine bay and noticed the 4runner I am Raiding has the same crack. Is this a common fault or am i lucky enough to have found 2 of the same problem. What would be the best way to fix it?
Hilux

4runner Dodgy fix

Mine has that too, it's probably not a good thing, but i'm not loosing sleep over it.

its probably been there for years as i have had a sqeaking type noise for about 3 years and couldn't find it so i am guessing thats it.

dave

all luxs get them mate. im for ever fixing them for mates and people at work. best bet is to weld her up but it will only crack again or actually plate over the top but the metal toyota used in there skirts just seem to be brittle