Engine Ventilation Hose

Purpose of This Essential Hose

This crucial engine component ensures that harmful gases do not build up inside the crankcase. The hose transfers oily air and combustion byproducts back to the intake for re-burning, keeping the engine bay clean and emissions low. Proper crankcase ventilation also helps maintain optimal air-fuel mixture and prolongs engine component life.

How It Works

The hose connects the crankcase to the intake system. As the engine runs, blow-by gases escape from the combustion chamber. This hose channels those vapors safely, preventing pressure buildup, oil leaks, and reducing pollutant emissions.

Risks of a Broken Hose

If this hose fractures, clogs, or leaks, it can cause rough engine running, increased oil consumption, poor fuel economy, and even emission test failures. Over time, engine performance and longevity suffer. Always replace damaged hoses promptly to avoid costly repairs later.

Compatible Models

• Q50
• Qx50/Ex
• Q70/M
• Q70/M Hybrid