Where does this hose go?

[Matthew13]

I found this the other day laying on my brake booster. Any idea what it does and where it should hook back up? Does it go to that hose hanging down on the firewall?

Car is a '97 B4 Sedan. (Yes, I know some of my hoses are ratty...slowly fixing that)

Thanks!
Matthew

IMG_4076 2.JPG

• Matthew13
• Apr 20, 2021

 

[dieseltruck]

Goes to the ECM under the right wiper. Follow your hose starting at the ecm.

 

[oilhammer]

To the ECU. The MAP sensor is inside. Goes up to the firewall, then through a holder, and then through the firewall by the passenger side strut tower, then back towards the middle of the car to the ECU. Take the cabin filter access cover off and you'll see it.

 

[dieseltruck]

In fact I think I see the end of that hose in your picture on the right side.

 

[Steve Addy]

Ditto what others posted, MAP sensor in the ECU.

You should be able to find another hose somewhere that it connects to. I would replace the line to the ECU with a completely new one that runs the full distance without a splicer.

Steve

 

[Matthew13]

All - appreciate your help. I thought it *might* go to the hose on the right (the one hanging there) but didn't want to plug the loose thing into the wrong thing and cross the streams.

Copy on the idea to run one continuous hose. Will add it to the list.

Thanks,
matthew

 

[oilhammer]

From the factory, VAG often used some plastic tubing to go the longer distances, and then the braided rubber stuff at each end. Whichever way is fine, just make sure it is all secure and not leaking.

The proper braided stuff is still available, and fits perfect, and is pretty long lasting and is resistant to abrasion and fluids. Continental makes it. Kraftstoffschlauch. N-20-353-1 3.5mm. I buy it by the 20m roll.

 

[Matthew13]

Thanks, Oilhammer! I'll look for some...Amazon auf Deutsch?

EDIT: Never mind - found it around at places like WCM: https://www.westcoastmetric.com/i-22967719-n-20-353-1.html

 

[ToddA1]

Geez, they’re still around? I dealt with them once, and never again....

-Todd

 

[Steve Addy]

Thanks, Oilhammer! I'll look for some...Amazon auf Deutsch?

EDIT: Never mind - found it around at places like WCM: https://www.westcoastmetric.com/i-22967719-n-20-353-1.html

Wow...pretty spendy for that stuff TBH. At $7 per meter I can find suitable alternative for less for non-fuel applications, and get it from a local parts store off the roll in back.

Steve

 

[oilhammer]

Well I wouldn't buy it there, anyway. I'm sure it is available in many places. I buy it in a big roll from a wholesaler, much less than that.