labatt, the part you circled in the first picture is indeed part of the upper radiator hose, the part number that you already found. Just to clarify, the ugly brown plastic thing that is cracked? You can't see the waterpump in that picture. That hose fitting is another quick disconnect fitting just like the other ends of the hoses that attach everywhere else in your system. The new one will be black. That nylon plastic material turns that ugly brown when it gets old and brittle and is about to fail just like yours did.

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Olympic Peninsula, WA, USA
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2005 Mini Cooper 100k, British Racing Green/Silver-Black
04/2002 4.6is 140k, Silver/Black-Alcantara *FOR SALE*
1989 325iX 270k, Diamond Black/Black
1984 318i 370k *SOLD* (First Bimmer)
Honorable Mentions: '71 2002, '87 325, '90 325ic, '92 525it, '93 325i, '94 530i