Universal Differential Breather Kit for Toyota 4Runner

The factory differential vent sits low and uses a simple open design. That becomes a problem the moment you hit water, mud, or even a high-pressure car wash. Water and dirt can get sucked into the differential housing, which contaminates the gear oil, causes corrosion, and wears out bearings and gears much faster than normal. If it goes unnoticed, the entire differential assembly can fail, and repairs get expensive fast.

This upgraded breather kit solves that problem by moving the vent to a higher, safer position and sealing the system properly. You get clean airflow without the risk of water entering the diff, even during deep water crossings or aggressive off-road driving.

What it offers

• Lightweight aluminium body that resists rust and corrosion

• CNC machining for a tight, precise fit that prevents leaks

• Anodized surface for strength and long-term durability

• Stainless steel plug rated to handle high pressure with a heat-resistant Viton seal

• Waterproof stainless steel ventilation valve that balances internal pressure while blocking water and debris, even when fully submerged

• High-pressure polyurethane hose designed for harsh weather and temperature swings

The ventilation valve is a key part of the design. It lets air move freely to balance internal and external pressure, which helps prevent seal damage or oil leakage. Even in deep water, the valve protects the differential from contamination so your gear oil stays clean and your diff stays healthy.

Item Details

• Type: Differential Breather Kit

• Materials: Billet aluminium, polyurethane, stainless steel

• Finish: Anodized

• Process: CNC machined

• Mounting location: Inside the engine bay

• Fitment: Universal

Package Includes

• 1 complete differential breather kit

If you want better protection for your differential during water crossings, off-road driving, or daily use, this kit gives you a reliable and long-lasting upgrade that keeps your diff breathing clean and safe.