ARB Differential Breather Kit 170112 — High‑Flow 4‑Port Manifold to Prevent Water Ingress and Seal Damage

ARB 170112 Differential Breather Kit provides a centralized, high‑flow venting solution that keeps differentials, the transmission and transfer case free of water and pressure build‑up.

When drivetrain housings heat and cool, internal air expands and contracts; without a proper breather this movement can draw in water or force seals to leak. The ARB 170112 kit routes up to four assembly vents to a single elevated filtration point, delivering zero back pressure and zero vacuum performance so your oils stay clean and your seals aren’t stressed during off‑road crossings or deep water drives.

How does the ARB breather kit prevent water from entering drivetrain components?

The kit uses a raised air filter and a small manifold so vent lines terminate high on the vehicle, above likely waterline exposure. The filter element keeps moisture and contaminants from entering while allowing unrestricted airflow out of the gear housings.

• Central high‑flow air filter positioned for water avoidance.
• Manifold accepts up to four breather lines for consolidated routing.
• Zero back pressure design prevents seals from pushing oil out under pressure.
• Secure fittings and tubing minimize siphoning and contamination risk.

What parts are supplied and how do they fit together?

The ARB 170112 kit ships complete with a molded manifold, air filter assembly, push‑in fittings, length of tubing, mounting screws and cable ties for tidy installation. Each component snaps or fastens into place so you can route lines from each axle, transmission and transfer case to the central unit without custom fabrication.

• Molded manifold with seven filter ports for flexible placement.
• High‑flow air filter and protective cap included for the ventilation point.
• Push‑in fittings and plugs speed installation and ensure leak‑free joints.
• Tubing, screws and cable ties for professional routing and mounting.

Will this kit affect gear performance or cause vacuum/back pressure?

No — ARB engineered the system to be high flow with zero vacuum and zero back pressure so gear boxes can breathe freely. That means normal thermal expansion and contraction of internal air won’t stress seals or force lubricant out of housings, preserving component life.

• Engineered for unrestricted airflow during thermal cycles.
• Eliminates pressure differentials that can push oil past seals.
• Designed to vent multiple assemblies without flow restriction.
• Maintains normal breathability under heavy load or heat.

How does installation impact vehicle layout and serviceability?

Installation consolidates multiple vent points to one accessible high location, simplifying inspection and maintenance. The tidy routed lines and included hardware keep components clear of moving parts and allow routine filter checks without lifting the vehicle.

• Consolidates vents for easier visual checks and service.
• Included cable ties and screws promote neat, secure routing.
• Positions the filter where it’s easy to inspect and replace if needed.
• No permanent modifications required for most vehicle applications.

Who is this for: The ARB 170112 Differential Breather Kit is aimed at 4x4 owners, overlanders and anyone who regularly encounters water crossings, muddy trails or heavy load conditions. It’s appropriate for people who want a reliable, OEM‑quality breather upgrade to protect differentials, gearboxes and transfer cases without sacrificing performance or serviceability.