What is this, yellow arrow


Asked by Jan 23, 2018 at 03:58 PM about the 2004 Audi A6

Question type: Maintenance & Repair

Leaking and can't find it in my book, found the pic online

6 Answers


looks like the pcv assembly.


Don't think it's that it's leaking coolant.


I tried.


its called avant return auxiliary heating hose assy,$121.92.

1 people found this helpful.
Best Answer Mark helpful

Close enough, after I took it off found a part number on it it actually a little electric coolant pump, and after looking it over closely it makes getting a coolant air lock almost impossible, needs to be made out of better stuff but a good idea. Thanks for the responses.


your welcome.

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