Dorman Engine Crankcase Breather Hose

Dorman Engine Crankcase Breather Hoses: Precision Fit, Lasting Performance

A failed crankcase breather hose might not seem like a dramatic repair, but its consequences can be — vacuum leaks, rough idle, oil consumption, and even failed emissions tests are all common results of a cracked or deteriorated hose. When it comes time to replace one, Dorman has established itself as one of the most trusted names in the aftermarket for these vehicle-specific components.

What Sets Dorman Apart in This Category

Dorman's approach to engine crankcase breather hoses is rooted in its broader engineering philosophy: don't just replicate the part that failed — understand why it failed and build something better. Crankcase breather hoses are notorious for succumbing to the harsh under-hood environment, where constant exposure to heat, oil vapor, pressure cycling, and engine chemicals gradually degrades rubber and plastic over time. Dorman engineers these hoses specifically to address those failure modes.

Each Dorman engine crankcase breather hose is designed to match the fit and function of the original hose on specified vehicles, and serves as a reliable replacement for an original hose that has failed due to pressure, heat, and cracking. Rather than a universal solution, Dorman produces vehicle-specific hoses — including crankcase vent hoses, vent tubes, crankcase vent-to-manifold tubes, breather hose assemblies, and vacuum breather hoses — so the replacement integrates seamlessly with your engine's existing PCV system.

Materials Built for the Under-Hood Environment

Dorman constructs these crankcase vent components from durable plastic and rubber materials, combining flexibility with resistance to the heat and chemicals commonly found in engine compartments, and designs them to meet emission control system requirements. This dual-material approach is key: rubber provides the flex needed to absorb engine movement and vibration, while reinforced plastic connectors and tube sections resist the thermal cycling that causes purely rubber hoses to harden and crack prematurely.

The OE FIX Engineering Philosophy

Dorman's reputation in the aftermarket is built on a disciplined engineering mindset. Their OE FIX engineering philosophy identifies common factory failures and redesigns the part to fix the root cause — not just replicate the flawed original. In many cases, Dorman will improve upon the OEM part if it identifies a design flaw that contributed to the problem — adding a protective coating to a fast-corroding part, for example. For breather hoses specifically, this means sourcing materials that stand up to prolonged oil vapor exposure and elevated crankcase pressures better than the factory part may have.

With more than 100 years of meeting customer needs in the automotive parts and service industries, Dorman provides original equipment solutions for automotive, heavy duty, agricultural, industrial, and recreational vehicle markets. All Dorman products include warranty coverage that protects against manufacturing defects, with specific warranty terms clearly stated with each item.

Wide Vehicle Coverage

Dorman's crankcase breather hose lineup spans a broad range of domestic and import applications — from classic Jeep Cherokee and Wagoneer models to Toyota Camry and many other platforms. The comprehensive Dorman catalog includes parts for domestic, Asian, and European vehicles across multiple decades. Whether you're a professional technician diagnosing a PCV-related fault code or a DIY enthusiast restoring proper crankcase ventilation to an aging daily driver, Dorman's vehicle-specific fitment data takes the guesswork out of the repair.

• Direct-fit replacement — no trimming, adapters, or modifications required
• Dual plastic and rubber construction — balances flexibility with chemical and heat resistance
• Emission system compatibility — engineered to maintain proper PCV function and emissions compliance
• Vehicle-specific designs — covers crankcase vent hoses, vent tubes, vent-to-manifold tubes, breather assemblies, and vacuum breathers
• Backed by Dorman's century-plus of automotive expertise and U.S.-based product support team