It’s not under pressure. Sounds like your car overheated.

Just JB weld it back on, it’s only a coolant overflow.

Anybody who tells you different doesn’t know what they’re doing.

If it was me I’d put a sleeve inside and join the broken pieces together with epoxy or something similar, then just epoxy or JB weld the crack.

It’s not under any pressure, it’s simply a coolant overflow, You could leave it as it is now and it would operate fine if you kept your coolant levels up. EPA might not be happy about the coolant you’re dumping on the road though.

Honestly if it was my vehicle ( and yea I’m a mechanic) I would patch it up until such time as I needed a radiator, which could be years.

Just so you know vehicles used to just run this hose to the ground,

Where’s the pressure? It’s an overflow hose. You realise older cars just dumped this hose to the ground right?

Op could literally run his car as it is, broken like that so long as they check their coolant levels regularly.

I’m guessing you’re assuming this hose goes to a pressure reservoir? The water trickles through the hose at best.

There’s no pressure there it’s just a return to the coolant overflow reservoir.