Expansion tank bottom hose leak, o-ring part number?

[Bans25]

Hi all,

My 2011 S4 is slowly leaking coolant from the bottom expansion tank hose. I believe I need to replace the oring. Does anyone know the Part Number? I am looking though coolant diagrams but it’s not clear on a specific oring part number to replace

Thank you

Bill

[Smac770]

https://audi.7zap.com/en/usa/audi+a4.../1/121-121067/

Hose 27, independent o-ring not identified. Someone might know the o-ring size for you to source separately.

[LowKeyLoki]

Might try this kit:
https://www.amazon.com/Assortment-Ga...ons&psc=1&th=1

$14 on Amazon worth a shot, if not return it, one of them probably fits.