Crankshaft Valve Breather Hose 11157513903 Compatible With For 3 SERIES E46

The crankshaft valve breather hose is a critical component that manages pressure buildup in your engine's crankcase, directing vapors back into the intake manifold. This OEM-specification part (11157513903) is engineered for BMW 3 Series E46 models, ensuring precise fitment and reliable performance. Constructed from durable materials resistant to heat and oil exposure, it maintains optimal engine breathing and prevents seal degradation. Proper ventilation through this hose reduces internal pressure, extends engine life, and supports fuel efficiency. A direct replacement for worn or damaged breather lines, this component restores your vehicle's emission control system to factory standards.

This OEM-grade crankshaft valve breather hose (part number 11157513903) is specifically designed for BMW 3 Series E46 vehicles. The breather system plays a vital role in regulating crankcase pressure by channeling blow-by gases back into the intake manifold, preventing harmful pressure accumulation that can damage seals and gaskets. Manufactured to strict factory specifications, this hose withstands extreme temperatures and oil exposure while maintaining structural integrity. Replacing a deteriorated breather hose restores proper engine ventilation, supports combustion efficiency, and protects internal engine components from premature wear. Essential maintenance for E46 owners seeking reliable performance and longevity.