Genuine BMW 11 15 7 934 559 Lower Crankcase Vent Pipe B58C Engine

The Genuine BMW 11 15 7 934 559 is an OEM lower crankcase vent pipe designed for BMW's B58C turbocharged inline-six engine. Also commonly referred to as a PCV (Positive Crankcase Ventilation) vent pipe or breather hose, this component routes blow-by gases from the intake duct and engine block back into the intake system, maintaining proper crankcase pressure and preventing oil contamination of the air intake.

BMW's pressure-controlled crankcase ventilation system relies on precisely routed pipes like this one to maintain a slight vacuum in the crankcase under all engine operating conditions. A failed or cracked vent pipe can result in vacuum leaks, rough idle, oil consumption, and potential check engine light conditions.

Key Features:

• 100% Genuine OEM BMW replacement part — manufactured to exact factory specifications
• Designed for the B58C turbocharged engine platform
• Direct OEM fit — no modifications required for installation
• Replaces the lower crankcase vent pipe connecting the intake duct and engine block
• Also known as: BMW PCV vent pipe, crankcase breather pipe, crankcase ventilation pipe

Choosing a Genuine BMW part ensures proper sealing, material durability, and long-term reliability compared to aftermarket alternatives. OEM part number: 11-15-7-934-559 (also referenced as 11157934559).