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🔩 Upgrade your ride’s defense—keep your differential dry and ready for every adventure!
This Union Coupler is a precision-engineered replacement part designed to relocate the rear differential breather tube on select Toyota models from 1995 to 2018. It prevents water ingress during off-road or wet conditions, ensuring your differential stays protected. Compatible with Tacoma, Tundra, 4Runner, Sequoia, and FZJ80, it offers an easy installation process using standard fuel hose connections and replaces OEM part 90404-51319 for reliable, factory-grade performance.
| Customer Reviews | 3.4 out of 5 stars 125 Reviews |
C**E
Achat risqué
Il est possible que la pièce ne fonctionne pas sur votre différentiel de 4runner. Une seule sur deux étaient bien fileté. J'ai pièce désormais inutilisable
H**Y
100%
Worked great for tundra breather extension
P**.
Good
Gave four stars because I have not installed it yet. But the unions appear well made. Will come back and update my review once I install.
B**O
Does not fit 2005 GX470
I bought this for my 2005 Lexus GX470. It says it's a replacement for the Toyota part number, but it doesn't fit. It appears that the thread pitch is different. It's nice to find this out two days before my trip.
J**C
Worked well
Did fit my 2014 sr5 Tundra. At first it seemed to be the wrong size, torque spiked after 1 turn. Went to put the original on and noticed it's tappered and had similar resistance to turning after a few turns. After slowly installing the new piece, it came on and off easily, threads didnt look deformed. Added some Teflon tape and good to go. Pictured oem part is after the top cap came off, I live in a snowy area and using a socket to take off the original worked best. Putting the mating hose in some hot water made install easy as well.
Trustpilot
1 week ago
5 days ago