It sucks that the broken hose comes part of an expensive hose assembly.

Looks like it can be done with that fitting, using epoxy to fix one end to the big hose, and a clamp on another.

But unless that hose is almost new, I'd just replace it and maybe even use it as an excuse for a cooling system overhaul.

__________________
04 X5 3.0i auto
03 X5 4.6is