What are these two hoses?
 

Boy, replacing breather hoses can really ruin your week.

I think all my seal weaknesses are popping up now.

Behind my passenger side wheel I can see two lines running vertically. They are wet near the connection. I think they are oil supply lines but I'm not sure. Also I think they are connected with a pressure fit pipe thread sort of connection.

I think highlighted area of this photo shows the hoses but I'm not 100%. When I was on my back I thought they were on the side of the engine but I was a bit disoriented. This pic shows them on the back corner of the engine near the pass. side tire. They look like what I saw and they're in the same approximate location.

Can anyone confirm what these are? I don't see them referred to anywhere in the bentley unless they are the oil supply lines.

The car is the one in my sig, is a leak here an easy diy?

Thanks!

edit: oil supply lines or oil cooler lines or is that the same thing?

Attachment 30312

Oil supply lines if memory serves.

heater core lines?
 

the more i look into it the more I think it also sounds like the coolant lines going to/from the heater core.

Would these lines hook into the system near the bottom of the firewall on the pass. side?

Either way, don't cut them. If it's a pinhole then you can get shrink-tape, wrap the affected area, then use a heat gun to shrink the tape tight around the leak. Also, if they're wet, what are they covered in? Oil or coolant? Don't overthink this shit.

Well, I don't plan on cutting them. I won't be able to get under until this weekend so I was hoping someone might recognize the lines and suggest possible parts.

I'm gonna have to at least take the belly pan down and remove the wheel liner if not drop the exhaust to get a good look at it. There's no way I can get in there to fix it w/o dropping the exhaust for sure.

They wet and they've covered in a thin film of brown. I'm not sure if it's just a little bit of oil of if it's coolant that has met some old oil from a previous leak...

They are either transmission or engine cooler lines. If they go to the transmission , they are transmission , if they go to the engine they are engine oil cooler lines.
What color is the fluid leaking out?

I'm still not sure what color it is, dirty brown on the ground.

I hadn't considered a transmission cooling line. And, now that I see the part, the connection *does* look like the right side of this part:

Transmission Oil Cooler Hose
Audi B5 A4 Quattro V6 30v > Drivetrain > Transmission > Cooler > ES#429689 Transmission Oil Cooler Hose - 8D0317825D

$117 for one, ugh, expensive (of course). Anyone swapped these out before? Is it a hard one?