Nissan PCV Crankcase Breather Hose – Engine Ventilation Line

Why this part is needed

This hose carries crankcase fumes to the intake so the engine can burn them cleanly. It keeps internal pressure stable, reduces sludge, protects seals, and helps maintain smooth idle and correct fuel trims. A healthy ventilation line also prevents oil mist from escaping into the bay, keeping your engine cleaner longer.

How it works

Linked between the rocker cover’s PCV/breather outlet and the intake tract, the hose uses manifold vacuum to draw vapors from the crankcase. The flow is metered by the PCV system, sending gases back into combustion. Quality hose material resists heat, oil, and ozone to hold shape, seal at clamps, and avoid kinks. ⚙️

What happens if it fails

Cracks or soft spots cause vacuum leaks: rough idle, lean codes, fuel smell, or whistle. You may see oil mist around the ports, higher oil use, soggy throttle response, or Check Engine light. Prolonged failure can push out seals and form sludge. Replace at first signs of hardening, swelling, or splits. Quick swap: release clamps, route like original, seat fully, no twists. ✅

Compatibility

• Teana
• Cube
• X-Trail
• Livina Geniss
• Wingroad
• Tiida
• Tiida Latio
• Bluebird Sylphy
• Ad/Ad Expert
• Sylphy
• Latio
• T70