Last year when the Golf R was new in our garage I posted about the chronic rear washer leaking: https://forums.vwvortex.com/showthread.php?9340563-Leaking-rear-washer-sprayer-2019-Golf-R
Fast forward about 1 year of ownership I have had the rear washer sprayer assembly replaced 3 times due to constant leaking, only to have it start leaking again after about a month each time. According to VW the check valve is inside the sprayer, so I have to just chock it up to poor design, poor supplier to VW, or both. So it's time to fix it once and for all.
The fix is to install a check valve in line near the sprayer. There are various check valves out there for washer systems, anything will work in general, here is what I bought.
Purchase the following parts, or similar parts (I found these in a Mk6 thread).
-Mini Cooper Valve (BMW part number 61-68-8-229-249)
-Two VW hose adapters (1J0955875R)
-Basic vacuum hose, 3/16 or 5/16
-Felt wiring harness tape. You can also use shrink wrap.
Remove the upper panel on the rear hatch. Pull to remove, it's just held on w/ clips, then plastic tabs at the end. Work slowly and carefully. Some of the metal clips may stay in the body, just remove those w/ pliers then reinsert in the trim piece when time to reinstall.
Find the thick felt wrapped tubing and pull it out of the opening in the hatch.
Just towards the center of the car through the opening is a white hose connector that connects the washer hose to the back of the 3rd brake light/rear washer assembly. Pull the black retaining tab back a little (careful!) while pulling the connector away from the nipple it attaches to. You can then pull the end of the tubing out with the connector. (Sorry this is difficult to photograph b/c it's a small space). I used a pick tool to pull the retainer back, then the connector popped off easily.
Cut back the felt tape. Cut out a section of the plastic washer tubing about 3" long to account for the length of your soon to be installed check valve.
Install the connector into each end of the original tubing. I heated up the ends of the tubing with a heat gun first, it made it much easier to push in the connector barb.
Connect the ends together with small sections of vacuum hose and the check valve. **Be sure the check valve is oriented in the right direction, an arrow shows the flow direction**
I chose to wrap the check valve and hose in felt electrical harness tape. You could also use shrink wrap, or nothing really.
Tuck the harness back into place and snap the connector back on the nipple on the back of the 3rd brake light/washer assembly. Then you are good to go!! Test operation....note the rear hatch must be closed to operate the rear wiper/washer.
Enjoy! I did this mod recently...tested it and compared to before the leaking is gone so far but it hasn't been that long. I will report back in a few weeks on the status/success of it, but logically I don't see how it can't work!.
Credit to this thread on a similar fix on the Mk6 Golf: https://www.diyauto.com/manufacture...leak-from-the-rear-washer-nozzle-by-71sbeetle
Fast forward about 1 year of ownership I have had the rear washer sprayer assembly replaced 3 times due to constant leaking, only to have it start leaking again after about a month each time. According to VW the check valve is inside the sprayer, so I have to just chock it up to poor design, poor supplier to VW, or both. So it's time to fix it once and for all.
The fix is to install a check valve in line near the sprayer. There are various check valves out there for washer systems, anything will work in general, here is what I bought.
Purchase the following parts, or similar parts (I found these in a Mk6 thread).
-Mini Cooper Valve (BMW part number 61-68-8-229-249)
-Two VW hose adapters (1J0955875R)
-Basic vacuum hose, 3/16 or 5/16
-Felt wiring harness tape. You can also use shrink wrap.
Remove the upper panel on the rear hatch. Pull to remove, it's just held on w/ clips, then plastic tabs at the end. Work slowly and carefully. Some of the metal clips may stay in the body, just remove those w/ pliers then reinsert in the trim piece when time to reinstall.
Find the thick felt wrapped tubing and pull it out of the opening in the hatch.
Just towards the center of the car through the opening is a white hose connector that connects the washer hose to the back of the 3rd brake light/rear washer assembly. Pull the black retaining tab back a little (careful!) while pulling the connector away from the nipple it attaches to. You can then pull the end of the tubing out with the connector. (Sorry this is difficult to photograph b/c it's a small space). I used a pick tool to pull the retainer back, then the connector popped off easily.
Cut back the felt tape. Cut out a section of the plastic washer tubing about 3" long to account for the length of your soon to be installed check valve.
Install the connector into each end of the original tubing. I heated up the ends of the tubing with a heat gun first, it made it much easier to push in the connector barb.
Connect the ends together with small sections of vacuum hose and the check valve. **Be sure the check valve is oriented in the right direction, an arrow shows the flow direction**
I chose to wrap the check valve and hose in felt electrical harness tape. You could also use shrink wrap, or nothing really.
Tuck the harness back into place and snap the connector back on the nipple on the back of the 3rd brake light/washer assembly. Then you are good to go!! Test operation....note the rear hatch must be closed to operate the rear wiper/washer.
Enjoy! I did this mod recently...tested it and compared to before the leaking is gone so far but it hasn't been that long. I will report back in a few weeks on the status/success of it, but logically I don't see how it can't work!.
Credit to this thread on a similar fix on the Mk6 Golf: https://www.diyauto.com/manufacture...leak-from-the-rear-washer-nozzle-by-71sbeetle