When you build your Toyota 4Runner to handle mud, river crossings, and deep backcountry trails, protecting your drivetrain isn’t optional it’s essential. That’s where the ARB Differential Breather Kit comes in.
From sandstone washes to forested mountain trails, water crossings can easily lead to costly differential damage if your breather isn’t properly vented. The ARB kit solves that by allowing your drivetrain front and rear differential to breathe clean, dry air from a protected location, far from the splash zone.
Built for Off-Road Toyota Rigs
This kit is purpose-built for Toyota rear axles, including: 3rd Gen (1996-2002), 4th gen (2003–2009) and 5th gen (2010–2023) 4Runners. Whether you’re running a V6 SR5, Trail Edition, or even a V8 Sport or Limited, this breather system gives you added confidence before tackling water crossings or dusty, high-altitude climbs.
Why You Need It
When hot drivetrain components (like your diff or transfer case) cool rapidly say, after plunging into cold water—they create a vacuum that can suck water, mud, or debris into the housing, potentially leading to contamination and catastrophic failure. This kit eliminates that risk by replacing the factory breather valves with high-flow, zero-back-pressure lines that allow the diff to vent safely, no matter the temperature or terrain. It also relocates and extends the OEM Vents to a higher location preventing water from entering into the diff during water crossings.
Features & Benefits:
- Compatible with Toyota 4Runner rear axles (4th & 5th gen)
- Works with up to 4 drivetrain assemblies – Includes enough line for 2; expandable to 4
- Splash-resistant air filter – Keeps water and dust out of your system
- CNC-machined anodized aluminum manifold – Durable and corrosion-resistant
- Compact design – Mounts cleanly on firewall or near intake for protection
- Zero vacuum, zero back pressure – Prevents seal blowouts and contamination
- No moving parts – Reliable design for peace of mind
? What’s Included:
- 4-port billet aluminum manifold
- Splash-resistant air filter
- Tubing and push-to-connect fittings for 2 connections
- Mounting hardware, zip ties, plugs, and screws
More tubing and fittings can be added for full 4-line setups.
✅ Confirmed Fitment:
This ARB breather kit is compatible with most Toyota 4WD models, including:
- Toyota 4Runner
- ✅ 3rd Gen (1996–2002)
- ✅ 4th Gen (2003–2009) – V6 & V8 models
- ✅ 5th Gen (2010–2023) – SR5, Trail, TRD Off-Road, TRD Pro, Limited
- Toyota Tacoma – 1995–2015 (All trims, PreRunner, X-Runner)
- Toyota Tundra – 2000–2015 (All trims and engine options)
- Toyota FJ Cruiser – 2007–2014
- Toyota Land Cruiser / Lexus GX – May require additional fittings
- ? Does not fit KDSS-equipped vehicles out of the box (may require custom routing).
Explore Without Limits
If you’re running trails with deep water, navigating dusty backroads, or simply want to bulletproof your Toyota 4Runner drivetrain, this is one of the smartest, most affordable upgrades you can make.
This breather kit is a must-have mod for serious overlanding and is trusted by Toyota off-roaders around the world.
