My 2006 R53 w/ Automatic and has a coolant hose failing that comes off the backside of the hard water pipe and connects to a T-Splitter. Based on my research I have two options 1) purchase a new 8-way hose P/N: 17127541095 as it is not sold individually or 2) a DIY solution that replaces the failing section of the heater hose or 3) P/N: 17127518574 #24 in below chart lists this on realOEM but for M/T does not specifically call for A/T - don't know if same part

The hard part is that this hose piece is a reducing 90-degree fitting. Before removing the hose and measuring myself I was hoping someone might have O/D of the hard water pipe and the O/D of the T-splitter (shown in image) to size the hose right.

One company I found does sell reducing elbows so there is some hope that doesn't run $110+ for one hose: https://www.pegasusautoracing.com/ke...ywordButton=Go

Thank you!

O/D of pipe on the hard water pipe needed

#6 shows the hose that is failing (#6 is a hose clamp part number)

#24 might be the part but not listed for A/T

 

On a MT it's a 5/8x3/4 reducer. There isn't a 90° bend in it though. Replaced mine with the same brand your considering.

 

if you had it off alot of times at your local parts stores they stock alot of random sizes and bends of coolant hoses n stuff in the back..alot of times they will even let you go look for it your self. Might be worth trying.

 

Thanks guys for suggestions.

Found this hose that is a 90° sweep of 5/8 to 3/4 I.D. Just needs some trimming. If doesn’t work then off to parts store to find a heater tube