BMW F01/F02/F07/F10/F11/F15/F16/F85/F86 N63 V8 Replacement Crankcase Ventilation Breather Hose – Restore Proper Crankcase Ventilation, Prevent Vacuum Leaks & Reduce Oil Vapor Leaks | Replaces Part No. 11158647961

Restore proper crankcase ventilation and help prevent unwanted oil vapor and vacuum leaks with this replacement crankcase ventilation breather hose designed for select BMW vehicles equipped with the N63 4.4L twin-turbocharged V8 gasoline engine. The crankcase ventilation system plays an essential role in managing combustion blow-by gases, regulating internal crankcase pressure, and directing oil-containing vapors back into the engine's intake system. Maintaining properly sealed ventilation hoses is particularly important for BMW's turbocharged V8 engines, where engine heat, crankcase pressure fluctuations, and complex intake plumbing place additional demands on the ventilation system.

As factory crankcase ventilation hoses age, prolonged exposure to elevated engine temperatures, oil vapors, vibration, and repeated heating and cooling cycles can cause the original plastic and rubber components to deteriorate. Hose connections may become brittle, sealing surfaces can weaken, and damaged fittings may allow crankcase gases to escape or unwanted air to enter the ventilation system. Common symptoms include rough idling, unusual whistling or hissing noises, increased oil vapor residue around engine components, abnormal crankcase pressure, and engine fault codes associated with air leaks or mixture regulation.

This replacement crankcase ventilation hose is intended to restore the original ventilation pathway associated with BMW part number 11158647961. By maintaining a properly sealed connection within the crankcase ventilation system, the hose helps direct blow-by gases through the intended ventilation circuit. Replacing a cracked, disconnected, or deteriorated breather hose can help correct ventilation-related leaks and restore normal system operation when the original hose is responsible for the problem.

BMW's N63 engine family uses a compact, high-temperature engine configuration with turbochargers positioned within the engine's V-shaped cylinder-bank arrangement. This design makes the condition of surrounding hoses, connectors, and ventilation components particularly important. A damaged crankcase ventilation hose can contribute to air leaks, oil vapor accumulation, and inconsistent ventilation operation. Correct hose routing, secure connections, and compatibility with the specific N63 engine revision are essential for maintaining the factory ventilation configuration.

For aging BMW vehicles equipped with N63-family engines, inspecting and replacing deteriorated crankcase ventilation hoses is an important maintenance procedure that can help reduce recurring ventilation problems and preserve engine reliability. Replacing damaged hoses before they develop substantial leaks can help maintain appropriate crankcase ventilation flow, reduce oil vapor escape, and support the intended operation of the engine's intake and crankcase pressure-management systems.

Key Features

• BMW N63 Twin-Turbocharged V8 Applications: Intended for select BMW vehicles equipped with compatible N63-family 4.4L gasoline engines using the crankcase ventilation hose identified by BMW part number 11158647961.

• Restores Proper Crankcase Ventilation Flow: Helps maintain the intended movement of combustion blow-by gases through the engine's crankcase ventilation circuit.

• Helps Prevent Vacuum and Ventilation Leaks: Replacing a cracked, disconnected, or deteriorated breather hose can help eliminate unwanted air leaks and crankcase vapor leakage originating from the original component.

• Supports Proper Crankcase Pressure Management: Maintaining sealed ventilation connections allows the engine's crankcase pressure-regulation system to operate as designed.

• Helps Reduce Oil Vapor Escape: A properly sealed ventilation hose helps contain oil-containing crankcase gases within the designated ventilation system rather than allowing them to escape around the engine.

• Supports Stable Engine Operation: Correcting ventilation-related air leaks may help reduce rough idling, abnormal engine noises, and mixture-control problems when a damaged hose is responsible.

• Factory-Style Replacement Configuration: Intended to replace the corresponding original BMW ventilation hose while maintaining the appropriate connection arrangement and factory routing.

• Addresses Aging-Related Hose Deterioration: Suitable for replacing original hoses affected by brittle plastic, cracked sections, damaged fittings, loose connections, or prolonged exposure to engine-bay heat.

• Supports the Existing PCV System: Works as a ventilation passage within the engine's crankcase breathing arrangement. The hose itself should not be confused with the complete crankcase pressure-regulating valve assembly.

• Important Preventive Engine Maintenance: Replacing deteriorated crankcase ventilation hoses can help prevent recurring air leaks, oil vapor contamination, and ventilation-related drivability problems.

Restore the intended crankcase ventilation performance of your BMW N63 engine with a properly matched replacement breather hose designed to maintain sealed ventilation connections and reliable crankcase gas flow. Replacing deteriorated components can help reduce unwanted air leaks, prevent oil vapor escape, and support normal crankcase pressure regulation. For BMW's twin-turbocharged V8 engines, maintaining the condition of ventilation hoses and related connections is an important part of preserving dependable engine operation and long-term reliability.

FITMENT: BMW 5 Series, 6 Series & 7 Series – N63TU 4.4L V8

Compatible with select BMW 5 Series, 6 Series, and 7 Series models equipped with the updated N63TU/N63N twin-turbocharged V8 engine and the corresponding crankcase ventilation pipe configuration.

BMW F07 5 Series Gran Turismo (Approximately 2013–2017)

• BMW F07 550i GT – N63TU 4.4L V8
• BMW F07 550i GT xDrive – N63TU 4.4L V8

BMW F10 5 Series Sedan (Approximately 2014–2016)

• BMW F10 550i – N63TU 4.4L V8
• BMW F10 550i xDrive – N63TU 4.4L V8

BMW F11 5 Series Touring – Select Markets

• BMW F11 550i Touring – N63TU V8, where equipped
• BMW F11 550i xDrive Touring – N63TU V8, where equipped

BMW F06 6 Series Gran Coupe (Approximately 2013–2019)

• BMW F06 650i Gran Coupe – N63TU 4.4L V8
• BMW F06 650i xDrive Gran Coupe – N63TU 4.4L V8

BMW F12 6 Series Convertible (Approximately 2013–2018)

• BMW F12 650i Convertible – N63TU 4.4L V8
• BMW F12 650i xDrive Convertible – N63TU 4.4L V8

BMW F13 6 Series Coupe (Approximately 2013–2018)

• BMW F13 650i Coupe – N63TU 4.4L V8
• BMW F13 650i xDrive Coupe – N63TU 4.4L V8

BMW F01 7 Series Sedan (Approximately 2013–2015)

• BMW F01 750i – N63TU 4.4L V8
• BMW F01 750i xDrive – N63TU 4.4L V8

BMW F02 7 Series Long-Wheelbase Sedan (Approximately 2013–2015)

• BMW F02 750Li – N63TU 4.4L V8
• BMW F02 750Li xDrive – N63TU 4.4L V8

Additional BMW ALPINA Applications

Parts catalogs also associate this ventilation pipe with select ALPINA models:

• BMW ALPINA B6 Gran Coupe – F06
• BMW ALPINA B7 – F01
• BMW ALPINA B7L – F02

These applications require individual VIN verification because engine specifications and ventilation components can differ.

Important Fitment Information

BMW parts catalogs identify part number 11158647961 for updated N63 engine applications across the F01/F02, F06/F07, F10/F11, and F12/F13 platforms. The component is specifically associated with the N63TU engine configuration rather than every vehicle equipped with an N63-family V8.

The original product title also mentions BMW F15, E53, E71, and E46. These chassis are not confirmed applications for part number 11158647961 and should not be advertised as compatible without vehicle-specific parts-catalog evidence.

In particular, the E46 3 Series and E53 X5 were not factory-equipped with the N63 engine. The E71 X6 and F15 X5 have N63-family applications, but their crankcase ventilation configurations differ and must be verified separately.

Production years are approximate application ranges. Exact fitment depends on the engine revision, vehicle production date, and factory crankcase ventilation configuration.

Engine Compatibility

BMW N63TU / N63N Engine Family

• BMW N63B44O1 – 4.4L Twin-Turbocharged V8 Gasoline Engine
• BMW N63TU – Updated N63 Engine Configuration
• BMW N63N – BMW Parts-Catalog Designation for the Updated N63 Engine

Applicable Vehicle Applications

• BMW 550i / 550i xDrive – N63TU
• BMW 550i GT / 550i GT xDrive – N63TU
• BMW 650i / 650i xDrive – N63TU
• BMW 750i / 750i xDrive – N63TU
• BMW 750Li / 750Li xDrive – N63TU
• Select compatible BMW ALPINA applications

OEM Replacement Part Number

• 11158647961 – Crankcase Ventilation Vent Pipe / Breather Pipe

Previous BMW Part Numbers

• 11157601451
• 11157601452
• 11157622488
• 11157640285
• 11158637873

BMW parts catalogs list these numbers as earlier references associated with the current vent pipe. However, replacement compatibility should be checked against the vehicle's VIN because earlier engine revisions and production configurations may differ.

Additional Engine Compatibility Information

The N63 engine family includes several revisions with different crankcase ventilation configurations.

The original N63 engine and updated N63TU engine share a common engine family designation, but their ventilation components are not universally interchangeable.

BMW part number 11158647961 is specifically associated with the updated N63TU crankcase ventilation system.

The component provides a ventilation connection within the V8 engine's crankcase breathing arrangement. BMW service-parts references describe it as a vent and fresh-air pipe associated with the N63TU system.

It is not a universal replacement for every crankcase ventilation hose, oil separator, or pressure-regulating valve used on N63-family engines.

Installation

• Factory-style replacement crankcase ventilation vent pipe for compatible BMW N63TU engines.
• Professional installation is recommended because the N63TU engine has a compact engine-bay configuration and multiple closely positioned intake, turbocharger, and ventilation components.
• Allow the engine to cool completely before beginning the replacement procedure.
• Locate the original crankcase ventilation pipe and identify its connections within the engine's ventilation system.
• Remove the necessary engine covers, intake components, or surrounding accessories required to access the original vent pipe.
• Inspect the existing pipe for cracks, damaged connectors, oil residue, loose fittings, or other signs of deterioration.
• Inspect surrounding crankcase ventilation components for damaged seals, deteriorated connections, or evidence of oil vapor leakage.
• Carefully release the original ventilation pipe connections according to the appropriate BMW repair procedure.
• Avoid applying excessive force to aged plastic connectors, as prolonged exposure to engine heat can make them brittle.
• Remove the original vent pipe while protecting surrounding intake and ventilation components from damage.
• Inspect the corresponding mounting and connection surfaces for contamination, damage, or deteriorated seals.
• Compare the replacement vent pipe with the original component to confirm the correct shape, length, connection orientation, and mounting configuration.
• Inspect all required sealing rings, O-rings, and profile gaskets before installation.
• Replace damaged or deteriorated sealing components according to the applicable BMW service procedure.
• Position the replacement vent pipe in the corresponding factory location.
• Connect the replacement pipe to the appropriate crankcase ventilation connections.
• Ensure all fittings are properly seated and secured without twisting or placing unnecessary tension on the pipe.
• Verify that the pipe follows the intended factory routing and maintains adequate clearance from surrounding components.
• Reinstall any intake components, engine covers, or mounting hardware removed during the replacement procedure.
• Tighten mounting hardware according to the appropriate BMW service specifications.
• Start the engine and inspect the replacement pipe connections for abnormal noises, oil vapor leakage, or signs of an air leak.
• Verify that the engine idles normally and that the ventilation connections remain properly secured.
• If ventilation-related fault codes or drivability symptoms persist, inspect the remaining crankcase ventilation system for additional problems.
• Perform an appropriate intake leak test or crankcase pressure test when necessary to verify proper system operation.

Replacing the vent pipe does not ordinarily require engine control module programming or electronic calibration.

However, additional diagnosis may be necessary if the original ventilation problem caused stored engine fault codes or if other crankcase ventilation components are malfunctioning.

BMW parts diagrams identify separate sealing components and an associated connecting line within the ventilation assembly. Confirm which seals and related components are required for the specific repair before beginning installation. 

Compatibility Notes

• Confirm Your BMW Engine Revision: Verify that your vehicle is equipped with the updated N63TU/N63N engine and the corresponding crankcase ventilation configuration.

• Verify the Original BMW Part Number: Confirm that the existing vent pipe corresponds to BMW part number 11158647961 or a documented compatible predecessor.

• N63 vs. N63TU Compatibility: The original N63 and updated N63TU engines use different ventilation configurations. Do not assume that a component designed for one revision fits the other.

• BMW F02 Compatibility: Select F02 750Li and 750Li xDrive models equipped with the updated N63TU engine use this vent pipe. Verify the vehicle's production date and original part number.

• BMW F07 Compatibility: Select 550i GT and 550i GT xDrive applications use the corresponding ventilation pipe. Confirm fitment using the vehicle's VIN.

• BMW F10 Compatibility: Select 550i and 550i xDrive models equipped with the updated N63TU engine are associated with this component.

• BMW F15 X5 Compatibility: The original product title mentions the F15 X5, but this chassis is not established as a compatible application for part number 11158647961. Verify the correct F15 ventilation component separately.

• BMW E71 X6 Compatibility: The E71 X6 was available with N63-family engines, but this does not establish compatibility with the updated N63TU vent pipe.

• BMW E53 X5 Compatibility: The E53 X5 was not equipped with the N63 engine from the factory. It should not be listed as a compatible application for this N63TU-specific component.

• BMW E46 Compatibility: The E46 3 Series was not factory-equipped with an N63 engine. This chassis should be excluded from the confirmed fitment list.

• Vent Pipe vs. PCV Valve: The vent pipe provides a passage for crankcase ventilation gases. It should not automatically be treated as a complete replacement for every pressure-regulating valve or oil separator component in the system.

• Inspect the Original Pipe Configuration: Compare the replacement component's overall shape, connection orientation, mounting points, and fittings with the original vent pipe before installation.

• Check Associated Seals: Damaged O-rings or profile gaskets can cause leaks even when the replacement vent pipe is correctly installed.

• Inspect Related Ventilation Components: BMW's N63TU crankcase ventilation system includes additional connections and pressure-regulating components that may require separate inspection or replacement.

• Vacuum Leaks Can Cause Similar Symptoms: Rough idling, hissing noises, and mixture-control faults can also originate from damaged intake connections, leaking gaskets, or other unmetered-air sources.

• Oil Consumption May Have Multiple Causes: Increased engine oil consumption can be associated with crankcase ventilation problems, but it may also result from valve stem seals, piston rings, turbocharger-related issues, or external oil leaks.

• Inspect for Oil Vapor Residue: Oil residue around ventilation connections may indicate a leaking pipe or seal, but the source should be confirmed before replacing components.

• Check Crankcase Pressure: Abnormal crankcase pressure may result from ventilation restrictions, malfunctioning pressure-regulating components, or excessive engine blow-by. Replacing the vent pipe will not correct unrelated mechanical problems.

• Confirm Included Components: The supplied part number identifies the crankcase ventilation vent pipe. Do not assume that additional gaskets, O-rings, connecting lines, or mounting hardware are included unless confirmed by the product supplier.

• Previous Part Number Verification: Earlier BMW vent pipe references may be superseded by 11158647961, but replacement compatibility must still be verified against the vehicle's production date and original equipment.

• OEM Reference vs. Genuine BMW: The BMW part number identifies the original equipment component. It does not independently establish that the replacement supplied is manufactured or packaged by BMW.

• Verify Fitment Using Your VIN: For the most accurate compatibility confirmation, check BMW part number 11158647961 against the appropriate BMW electronic parts catalog and compare the replacement component with the original before purchasing.

Maintaining the crankcase ventilation system is particularly important for BMW vehicles equipped with the N63TU twin-turbocharged V8 engine, where elevated engine-bay temperatures, aging plastic connections, and deteriorated ventilation seals can contribute to air leaks, oil vapor accumulation, and abnormal crankcase pressure. Replacing a damaged crankcase ventilation vent pipe with the correctly matched component helps restore the intended ventilation pathway, maintain properly sealed connections, and support reliable engine operation. Inspecting associated sealing rings, ventilation connections, and pressure-regulating components during replacement can further improve system reliability and help preserve the performance and long-term durability of your BMW V8 engine.