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The hose that comes from the heater core to the coolant temperature sensor housing broke, and i have no idea where to start. I cant find anything online about replacing the hoses, or anything about them. Do I have to replace all 3 hoses that are in the heat shield? Could anyone give me tips or answers? I would greatly appreciate it. i'm in the dark with this one.
I added some pictures of the hose from the coolant temperature sensor housing and the hose from the heater core to show what i'm talking about.

Hose from coolant temperature sensor:
https://1drv.ms/i/s!Atmxme0CHpyexkf8QJH33fxpl6YL
Hose from heater core (right one):
https://1drv.ms/i/s!Atmxme0CHpyexkb_EWpRpFx4ob34
is this the part I need to replace that?
https://www.ecstuning.com/b-genuine-volkswagen-audi-parts/coolant-hose/1c0122157n/
 

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Well, like most repairs; you need to tear things down to the point, where you can get the bad parts out and then find replacements. Many of the most common hoses are being made by Gates and CRP/Rein; which are substantially cheaper than genuine vw but some hoses are only available from VW, so you need to research and see if they are available through the aftermarket. VW tends to put hoses inside protective sleeves and many times; the aftermarket will sell hoses but without all the webbed/protective sleeves, so it may look different than the original. The best thing to do is to get the original part number off the old hose or look it up on VW's website; then, try to cross reference the part number with the aftermarket companies online catalog.

search by application or cross reference or both:

CRP/Rein:

CRP Online Parts Catalog

Gates:

NaviGates

the Gates cross reference search; seemed to come up with two part #'s:

Gates part #: 19787: 3/4" x 24"Cooling System Components Molded Heater Hose

http://navigates.gates.com/AddedValue.aspx?PartNumber=19787

Gates part #: 19788: 3/4" x 18 5/16"Cooling System Components Molded Heater Hose

http://navigates.gates.com/AddedValue.aspx?PartNumber=19788

Depending on where you can find them; order the hoses you need and start swapping out the parts.

The VW hoses are held on by hose constant tension clamps made by Mobea; these are tough to get off it in tight situations. I invested in a special cable hose clamp plier; it makes your life easier and in tight quarters, it can almost be impossible to get them off without them. Many companies and stores sell these now a days; I bought (at the time), the cheapest high quality version I could find and it was sold at Sears in the Craftsman line of tools. It is made by a different company now and the quality is not a good but you can get a idea of the type of pliers I am talking about. All of these type wear out and cables eventually break; so, make sure to get one from a company that offers a lifetime warranty.

Item # 00949803000P Model # 49803
CRAFTSMAN CABLE OPERATED HOSE CLAMP PLIERS

https://www.google.com/search?q=Item+#+00949803000P+Model+#+49803+CRAFTSMAN+CABLE+OPERATED+HOSE+CLAMP+PLIERS&oq=Item+#+00949803000P+Model+#+49803+CRAFTSMAN+CABLE+OPERATED+HOSE+CLAMP+PLIERS&aqs=chrome..69i57.889j0j4&sourceid=chrome&ie=UTF-8

Lastly, you will probably end up breaking plastic hose flanges and the elbows that come off the firewall. These are available through your vw dealer or they are sold under the Dorman brand of parts, from most auto parts stores. Don't be surprised, if you have to replace a number of plastic cooling system parts; as they get really brittle with heat and age.

Once you replace everything; top off the coolant with the correct type and check for leaks, you should be good to go! Let us know, how the repairs go! Thanks.
 

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Discussion Starter #3 (Edited)
Well, like most repairs; you need to tear things down to the point, where you can get the bad parts out and then find replacements. Many of the most common hoses are being made by Gates and CRP/Rein; which are substantially cheaper than genuine vw but some hoses are only available from VW, so you need to research and see if they are available through the aftermarket. VW tends to put hoses inside protective sleeves and many times; the aftermarket will sell hoses but without all the webbed/protective sleeves, so it may look different than the original. The best thing to do is to get the original part number off the old hose or look it up on VW's website; then, try to cross reference the part number with the aftermarket companies online catalog.

search by application or cross reference or both:

CRP/Rein:

CRP Online Parts Catalog

Gates:

NaviGates

the Gates cross reference search; seemed to come up with two part #'s:

Gates part #: 19787: 3/4" x 24"Cooling System Components Molded Heater Hose

http://navigates.gates.com/AddedValue.aspx?PartNumber=19787

Gates part #: 19788: 3/4" x 18 5/16"Cooling System Components Molded Heater Hose

http://navigates.gates.com/AddedValue.aspx?PartNumber=19788

Depending on where you can find them; order the hoses you need and start swapping out the parts.

The VW hoses are held on by hose constant tension clamps made by Mobea; these are tough to get off it in tight situations. I invested in a special cable hose clamp plier; it makes your life easier and in tight quarters, it can almost be impossible to get them off without them. Many companies and stores sell these now a days; I bought (at the time), the cheapest high quality version I could find and it was sold at Sears in the Craftsman line of tools. It is made by a different company now and the quality is not a good but you can get a idea of the type of pliers I am talking about. All of these type wear out and cables eventually break; so, make sure to get one from a company that offers a lifetime warranty.

Item # 00949803000P Model # 49803
CRAFTSMAN CABLE OPERATED HOSE CLAMP PLIERS

https://www.google.com/search?q=Item+#+00949803000P+Model+#+49803+CRAFTSMAN+CABLE+OPERATED+HOSE+CLAMP+PLIERS&oq=Item+#+00949803000P+Model+#+49803+CRAFTSMAN+CABLE+OPERATED+HOSE+CLAMP+PLIERS&aqs=chrome..69i57.889j0j4&sourceid=chrome&ie=UTF-8

Lastly, you will probably end up breaking plastic hose flanges and the elbows that come off the firewall. These are available through your vw dealer or they are sold under the Dorman brand of parts, from most auto parts stores. Don't be surprised, if you have to replace a number of plastic cooling system parts; as they get really brittle with heat and age.

Once you replace everything; top off the coolant with the correct type and check for leaks, you should be good to go! Let us know, how the repairs go! Thanks.
Thank you for all of that! It really helped me to not spend almost $300 on some hoses, but i have a couple questions. First of all, when i buy the 2 separate hoses and the one or both don't have that protective sleeve will that mess with them and make the life of the hoses shorter? and also i assume i can slide off the heat shield and and put it on the new hoses right? if you could please reply to me i would greatly appreciate it!
 

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I haven't replaced that particular hose myself; once you get it out, you will have to see if you can swap out the hoses or slice the old sheathing to reuse it. If you can't, I am sure you can get some type of cloth tape or other material and make your own sheath if need be. I assume, the covering is for protection; to keep the rubber from heat damage. You might check with your local auto parts store and see what they have to replace it with. Then you could put tie wraps around it or as noted, some sort of tape, everything from foil tape or cloth tape could work. You will just have to figure out what works and how things will look; if aesthetics are a issue for you. :)

other examples of possible hose protective solutions: heat shielding, heat shrouding, heat sheathing, etc.

https://www.google.com/search?q=automotive+coolant+hose+heat+shield&oq=automotive+coolant+hose+heat+shield&gs_l=psy-ab.3..33i22i29i30k1.13424.15717.0.15853.11.11.0.0.0.0.151.921.0j7.7.0....0...1.1.64.psy-ab..4.7.918...0i22i30k1.XNnQXujdiUw
 

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heat shielding tape

ebay has good inexpensive heat shielding cloth tape I used it before when I was replacing the one coming out from the turbo and into the Intercooler.
 
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