Engine Blow-By Hose Assembly

Why You Need This Part

This essential hose assembly is responsible for venting vapors and excess pressure from the crankcase back to the intake. The process prevents oil leaks, reduces emissions, and ensures engine efficiency. Without this hose, abrasive gases would contaminate engine oil and pressure could damage gaskets or seals.

How It Works

Mounted between the engine and the air intake system, this assembly allows filtered air and vapor to recycle safely through the combustion system. It helps maintain the correct pressure in the crankcase and keeps the engine environment clean.

Problems If Broken

• Oil leaks inside or outside the engine
• Loss of engine power or rough running
• Check engine light illumination
• Increased exhaust emissions
• Poor fuel economy

Compatible Models

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