BMW E36/E39/Z3 Crankcase Vent Breather Hose – OEM PCV System Replacement, Restores Crankcase Ventilation Performance for 323i, 328i, 528i, M3 & M52 Models | Replaces Part No. 11151703484

Restore proper crankcase ventilation and PCV system performance with this OEM replacement Crankcase Vent Breather Hose for select BMW E36, E39, and Z3 models equipped with the M52 engine. Designed to replace the factory breather hose, this component plays an important role in routing crankcase vapors correctly through the ventilation system, helping the engine maintain smooth operation, proper pressure balance, and dependable long-term performance.

As these BMWs age, original breather hoses can become brittle, crack, collapse, or develop leaks from years of heat exposure and oil vapor contact. Once that happens, the PCV system can no longer function correctly, which may lead to vacuum leaks, rough idle, oil seepage, poor drivability, lean mixture faults, and increased crankcase pressure. Replacing worn breather hoses is an important maintenance step for keeping the engine running properly and preventing avoidable PCV-related issues.

This replacement hose is designed to restore the original routing and function of the factory unit, making it a dependable solution whether you are repairing a failing crankcase ventilation system, correcting a vacuum leak, or refreshing aging engine bay hoses as preventative maintenance. It helps restore proper vapor flow and supports the smooth, balanced operation your BMW was designed to deliver.

Built for OEM-style fitment, this hose is designed to integrate cleanly with the factory crankcase ventilation system on compatible M52-powered applications. It is an ideal replacement for owners looking to maintain proper PCV function, dependable sealing, and long-term engine bay reliability.

Key Features:

• Direct OEM Replacement: Designed to replace the factory crankcase vent breather hose on compatible BMW M52 applications.
• Restores Proper PCV System Operation: Helps maintain correct crankcase vapor routing and pressure balance.
• Supports Smoother Engine Performance: Can help address rough idle, vacuum leaks, and drivability issues caused by a failing breather hose.
• Helps Prevent Crankcase Ventilation Problems: Replacing worn hoses can help reduce the risk of pressure buildup, oil seepage, and mixture-related faults.
• OEM-Style Fitment: Built to match the original hose routing and installation layout on compatible BMW applications.
• Ideal for Repairs and Preventative Maintenance: A smart replacement when refreshing aging PCV and breather system components.

FITMENT:

• BMW 3 Series – E36 Sedan, Coupe, Convertible
• BMW 5 Series – E39 Sedan
• BMW Z3 – Roadster, Coupe

Compatible with select BMW applications including 323i, 328i, 528i, M3, and other M52-powered models using this crankcase vent breather hose configuration. If you’re unsure whether this hose fits your specific vehicle, please contact us with your VIN and we’ll be happy to verify compatibility before you order.

REPLACES PART NO.: 11151703484

Please refer to the “Fitment” section in the product description for compatibility details.