Engine Blow-By Hose Assembly

Why You Need This Hose

This hose is vital in controlling the gases that escape from your engine's crankcase, known as "blow-by." Without this channel, harmful fumes would remain inside, potentially damaging the engine and causing poor performance. The hose directs these gases back into the intake system to be safely burned, keeping your vehicle emissions cleaner and your engine running smoothly.

How It Works

As the engine operates, minor combustion gases slip past piston rings into the crankcase. This specialized hose assembly collects those gases and reroutes them through the intake manifold. This process helps maintain optimal engine pressure and prevents the build-up of oil sludge.

What If The Hose Breaks

A cracked or broken hose can lead to engine vacuum leaks, irregular idling, loss of power, or even “check engine” warnings. Left unchecked, unfiltered blow-by can damage emissions components and reduce fuel efficiency. Replacing a faulty hose restores engine reliability and protects essential parts.

Compatible Models

• M35/45
• Qx50/Ex
• Q50
• Q70/M Hybrid
• Q40/G Sedan
• Qx70/Fx
• Q70/M