Rein 11-15-7-575-640 Crankcase Breather Hose

The Rein 11-15-7-575-640 is a high-quality replacement crankcase breather hose designed to restore proper positive crankcase ventilation (PCV) system operation. This hose connects the engine crankcase to the intake system, allowing blow-by gases and oil vapors to be recirculated back into the combustion chamber rather than vented to the atmosphere.

Key Features:

• Direct OEM fit replacement for BMW part number 11-15-7-575-640
• Constructed from durable rubber compound resistant to heat, oil, and engine chemicals
• Designed to withstand constant exposure to hot crankcase gases and underhood temperatures
• Prevents vacuum leaks that can cause rough idle, poor performance, and check engine lights
• Helps maintain proper crankcase pressure and prevents oil leaks from seals

Crankcase breather hoses deteriorate over time due to heat cycling and exposure to oil vapors, becoming brittle and cracked. A failed breather hose can introduce unmetered air into the intake system, causing lean running conditions and triggering fault codes. Regular replacement ensures proper emissions control and engine performance.