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VW / Audi 1.8T Golf/Jetta/TT Coolant Y Pipe

Please Contact Us for Ordering Info
1.00 LBS

Product Description


Please Note : These are not cheap, made in China castings that will break faster than the OEM plastic part.  These are 100% PRESSURE TESTED TO 100 PSI, MADE IN CALIFORNIA by an Aerospace Tube Bender, and GENUINE STAINLESS STEEL.  These have a LIFETIME WARRANTY !!!!  Consider these factors before buying a Walmart brand knock off which is made in China and will break as fast as the OEM plastic version. is pleased to announce the release of our MKIV VW Golf/Jetta 1.8T and Audi A3, TT MK1 1.8T Billet Y Pipe to replace the plastic OEM fitting found on hose P/N 1J0-122-109AQ.

The OEM plastic Y connector used in this hose has an important task : it connects the coolant reservoir outlet to the turbocharger, with a 3rd connection for the inlet coolant supply. However, due to its location near the turbocharger and hot exhaust manifold, the plastic fitting within the hose quickly dries out and snaps. Just because its a small fitting doesn't mean it wont cause big problems. When it breaks, your engine will experience rapid loss of coolant which can turn your screaming 1.8T into a paperweight.

The billet 1.8T Y Pipe is machined from Aircraft Grade Stainless Steel, precision bent on a CNC tube bender, then precision welded and pressure tested. You could park the car on this one and it will not break !

This billet 1.8T Y Pipe is intended to replace the plastic Y fitting in hose OEM P/N 1J0-122-109AQ on the following vehicles :

1999 - 2006 Audi TT mk1 (AUM/AUQ/ARY)
1996 - 2003 Audi A3 mk1 (AGU/ARZ/ARX/AUM/AJQ/APP/ARY/AUQ)
2000 - 2006 VW Golf/ GTI/ Jetta/ Bora mk1 (AUM/AUQ/AGU/AWD/AWP/AWW)
1999 - 2006 SEAT León mk1 (AJQ/APP/ARY/AUQ/AMK)
-any other model that calls for PN: 1J0122109AQ


Please check your OEM P/N to ensure your vehicle uses P/N 1J0-122-109AQ (1J0122109AQ) before ordering.

Product Reviews

  1. coolant y pipe 5 Star Review

    Posted by on 20th Feb 2017

    this item is a quality made piece this item will most likely outlast the car,thanks gruven parts

  2. Great 5 Star Review

    Posted by on 12th Nov 2016

    Very simple and straight forward install. I don't worry about ever replacing it again. Invest and grab this. Thank you Gruven!

  3. Thank you Grüvenparts! 5 Star Review

    Posted by on 9th Jan 2016

    I have a 2004 GLI. This part replaced a stock part that was a brittle plastic piece and after time can break or leak from the high heat treatment it goes through every time you drive with passion. I am so pleased I found this company and am able to purchase these unique parts that make my car not only look a heck of a lot better but gives me reassurance that nothing's going to crack or break and leak under my hood. Thank you Paul for the amazing parts you make !

    -- Response --

    Much Thanks Tyler ! Let us know what else you need. This 1 carries a LIFETIME WARRANTY so you are all set.

  4. Gruven parts are awesome 5 Star Review

    Posted by on 17th Mar 2015

    Got the y -pipe fitted with ease! It fit exactly like the OEM piece and will never fail!

    It looks way cooler also! Thanks!

  5. The headache to have plastic oem 'Y' 5 Star Review

    Posted by on 25th Feb 2015

    Hello us followers of 1.8t vw takes away a headache to change this oem "Y" plastic that of s / s as the heat and the start time and leave us on the road and the cost of the tow is double or triple the cost of this is of s / s my step and why I want to change it for one of higher quality than oem.

  6. it works 5 Star Review

    Posted by on 3rd Jun 2014

    This part replaced the plastic stock piece. 2 months in and no problems! And it looks good.

    >>Response from Gruven<<

    Thanks for the review ! Please post up some pictures in the forums, we have found lots of people with similar issue using the plastic part, so this will be a big help! Would also love to see pics of the part installed in your engine bay - send to if you can.

  7. a fantastic part looks stock but is much better 5 Star Review

    Posted by on 23rd Apr 2014

    The factory one broke and two weeks into a new factory one it broke again. But luckily there is someone smArt enough to not use plastic on a part in that area

    >>Response from Gruven<<

    Thanks Nathan for this review. We have had so many owners contact us about the plastic OEM version of this part, we had to do something. Ours is made from stainless with barbed fittings, professionally welded, and then 100 % pressure tested before shipping. You wont have to deal with this problem again, ever !! I think you could also drive the car over our version, but save that for the plastic 1 you yank out. Let us know what else we can build properly for these cars --

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