Whoopsy I think!

That's an interesting failure mode for the panhard to just shear in the middle. More usual for it to kill its bushes or rip a mount bracket off one end. And that just happened driving down the road? Seems a very clean and straight break for the middle of a tube. The panhard is usually either under tension or compression under normal circumstances and being free to rotate at both ends it doesn't experience a bending force of any magnitude One would usually expect a tube to exhibit an area of narrowing or waisting as the material yields before failing and the actual failure point would be more ragged from a tension overload. And a compression overload would cause bending and buckling. A relatively thick walled tube like that is actually really quite tough and the amount of movement it is likely to experience shouldn't really be able to do that kind of damage in isolation. Very odd.

Panhard rods have been known t bend off road, so a little accident will have the same effect.

Shearing in half is a little less expected!

Kirkynut

So it could have been a preexisting stressed area that has work hardened or fatigued and failed over time rather than necessarily failing in one event? Hmmm still quite odd. Not that it matters now you have fixed it.