So just replaced a faulty main cooling fan, and then noticed the coolant was leaking somewhere (so no more coolant holding) and is coming from the area where this black 90 degree bent hard plastic pipe is coming out from the engine head that goes back towards the middle of the engine and is impossible to follow after that. Maybe it is the O-ring that is bad now or maybe the pipe is damaged but what is this pipe called if I need to get a new one? Sorry not sure how else to explain it, I hope it is clear.

I am looking here and there seems to be at least 2 of them, if at all?

https://www.fcpeuro.com/BMW-parts/33...coolant%20pipe