Cylinder Head Coolant Vent Pipe, Rein - F10 550i, F13 650i, F02 750i, X5/X6 50i

Y-shaped hose, a common leak point on N63. OEM-replacement for BMW part #17127576363 with upgraded metal central fitting

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This metal version has been discontinued. Please see our Related Items below for OEM versions.


Coolant leaks near the turbos on the N63 engine may be traced to this vent pipe for the cylinder heads. The Y connection on the original hose was plastic and prone to cracking and leaking near the turbos. This hose addresses this weakness with an upgraded metal fitting!

This coolant pipe / hose was used on early models of the N63 V8 engine: 2011-2013 F10 550i, 2012 F12/F13 650i, and 2009-2012 F01/F02 750i. These models use the N63 engine (N63A), and not the N63TU engine that came out in 2013. Note the years as the cooling system was re-designed on the later models. 

Now with upgraded metal fitting! The Achilles heel of this hose has historically been the plastic fitting in the middle. Over time, with exposure to lots of heat and hot / cold heat cycling, the original plastic Y fitting would get brittle, crack, leak, and fail. This upgraded version has a METAL central fitting, which makes it more robust and will surely last longer than the original plastic / composite fitting version. This is the version we'd use on our own BMWs at BimmerWorld! 

This is an OEM N63 vent pipe manufactured by Rein Automotive - an original supplier to BMW for this part, as well as many other engine and cooling components. As an OEM it meets all of BMW's original design, fitment, and performance requirements and is TUV approved. OEM parts are the best alternative to more expensive Original BMW parts because they are virtually identical without the inflated price tag. This part has a two year warranty.

BMW Fitments:
5 Series
F10 / F11 (11-16) > 550i
F10 / F11 (11-16) > 550i xDrive
6 Series
F12 / F13 (12-18) > 650i
F12 / F13 (12-18) > 650i xDrive
7 Series
F01 / F02 (2009-2015) > 750Li
F01 / F02 (2009-2015) > 750Li xDrive
F01 / F02 (2009-2015) > 750i
X5 Series
E70 X5 (07-13) > X5 xDrive50i
X6 Series
E71 X6 (2008-2014) > X6 xDrive50i
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