Crack in hose, What is it?

[henstepper]

Hello,

I have been hearing a whistle while driving, So i popped the bonnet and saw a large amount of water soaking the firewall of the car. On closer inspection I can see there is a crack in this hose (see pictures). What is it and how much am I looking at to fix it? I am not losing coolant, So I'm guessing it might be a hose to the air vent?

 

[DavesSV6Tonner]

Corrugated black plastic wiring harness conduit. It is made like that so it can be fitted over the harness.

 

[henstepper]

What would be causing my firewall to be soaking wet like it is?

 

[rambunctious]

What would be causing my firewall to be soaking wet like it is?

Possible condensation on the air con pipe going into the valve on the firewall.
The Z looking pipe.

Or there could be a break in the rubber which seals the bonnet to the cowl.

You need to track down the whistle just the same.