Vent Pipe BMW F10 M5 F12 F13 M6 S63N Cylinder Head Breather Line Hose 7843151

The BMW F10 M5 F12 F13 M6 S63N Crankcase Ventilation Hose is an original component of the crankcase ventilation system, designed for the powerful S63N engines in sporty BMW 5 and 6 Series models. With its factory geometry and fit, it ensures proper oil vapor evacuation and stable engine operation under heavy load. This is a solution for users who expect consistency with the factory design and want to maintain the characteristic performance of the V8 biturbo unit.

Specifications and technical data

• SKU: 7843151
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7843151
• Substitutable numbers: 7843151, 11157843151
• Category: Hoses, Lines & Pipes

Purpose and Technical Function

The crankcase ventilation hose in the S63N engine is responsible for the controlled evacuation of gases from the crankcase into the intake system. In high-performance units like the M5 F10 or M6 F12/F13, the correct functioning of this component is crucial for:

• maintaining stable crankcase pressure at high RPMs,
• limiting unwanted oil blow-by into the intake,
• ensuring proper turbocharger operation and mixture control,
• reducing the risk of leaks and oil seepage around the valve covers.

A properly selected crankcase ventilation hose supports consistent engine performance and helps maintain correct combustion parameters during dynamic driving.

Design and Fit for BMW M5 / M6

The offered crankcase ventilation hose belongs to the group of Hoses, Tubes, and Pipes, meaning it is designed to operate in an environment of elevated temperatures and contact with oil vapors. The shape and connection diameters are adapted to the S63N system, facilitating installation in the engine bay without the need for modifications to other components.

Its original BMW origin promotes adherence to factory routing, proper positioning relative to turbochargers, manifolds, and accessories, and minimizes the risk of collision with other elements. This is particularly important in the densely packed engine bays of M models, where every millimeter of space is critical for servicing and cooling.

Benefits of Using an Original Crankcase Ventilation Hose

Using an original crankcase ventilation hose in the S63N engine offers a range of practical operational benefits:

• maintaining compliance with the factory ventilation system specification,
• reducing the risk of leaks resulting from ill-fitting aftermarket parts,
• stable engine operation under high load and prolonged highway driving,
• easier diagnostics – mechanics can be confident that the system is built with components of known parameters.

For M5 and M6 owners who intensely utilize the S63N engine's potential, replacing a worn crankcase ventilation hose with an original part helps reduce the risk of oil blow-by issues and unwanted intake deposits.

Condition, Verification, and OEM Selection

The item is offered as a used part, allowing for economical repair while maintaining the original BMW construction. Before installation, a standard visual inspection is recommended to check for any micro-cracks, material hardening, or signs of excessive wear, ensuring predictable performance in the demanding thermal environment of the S63N engine.

When selecting a crankcase ventilation hose for your M5 F10 or M6 F12/F13, it is advisable to use the OEM number and interchangeable numbers, which facilitates precise matching to the specific engine version and model year. This minimizes the risk of errors and ensures that the ventilation system will operate according to the manufacturer's specifications.

Expanding the Hose System in BMW

If you are planning a comprehensive engine area repair or upgrade for your BMW and need other parts from the same group, such as vacuum hoses, coolant hoses, or breather pipes, check the available parts in the BMW Hoses, Tubes, and Pipes category.

To better plan the servicing of the crankcase ventilation system and other components in sporty M models, an article describing a practical approach to selecting original parts by OEM numbers and their impact on the durability of the powertrain may be helpful – you can find it here: BMW – Sporty Performance and Precision. How Used Original Parts Extend the Life of the Bavarian Icon?.