Breather Pipe BMW F10 F13 Petrol N63 Cylinder Head Connecting Pipe Cyl. 1-4

Breather Pipe BMW F10 F13 Petrol N63 Cylinder Head Connecting Pipe Cyl. 1-4 is an original crankcase ventilation system component, designed for N63 petrol engines in BMW 5 Series F10 and 6 Series F13 models. This specialized pipe serves cylinders 1–4, ensuring stable discharge of oil vapors and gases from inside the engine. By maintaining factory geometry and diameters, the pipe enables proper operation of the breather system and supports smooth engine performance.

Specifications and technical data

• SKU: 7646086
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7646086
• Fuel type: Petrol
• Category: Other Engine Parts

Function of the breather pipe in the N63 engine

The breather pipe in the N63 engine is responsible for the controlled discharge of gases from the crankcase into the intake system. A properly selected pipe:

• stabilizes pressure in the crankcase,
• reduces the risk of oil leaks and blow-by,
• supports correct lubrication of moving parts,
• contributes to the smooth operation of cylinders 1–4.

By maintaining the factory routing, the breather system in the N63 petrol engine retains parameters similar to the configuration installed by BMW on the production line.

Compatibility and fitment for BMW F10 / F13

The offered pipe has been designed for N63 petrol units used in BMW F10 and F13 bodies. This means:

• proper fitment to the intake system and valve cover on the cylinder 1–4 side,
• maintenance of the correct rigidity and flexibility under typical engine bay operating conditions,
• possibility of installation in place of a worn or leaking pipe without the need for modifications.

Such fitment facilitates service and shortens replacement time, which is important when maintaining the complex breather system in the N63 engine.

Characteristics of the used component

As a used component, the breather pipe is a cost-effective solution while maintaining the original BMW design. In practice, this means:

• factory geometry of connections and diameters,
• retention of the original pipe routing in the engine bay,
• suitability for use in maintenance repairs or restoring the efficiency of the breather system.

For many users and workshops, this is a reasonable choice when servicing N63 petrol engines, where tightness and proper crankcase ventilation are crucial for engine durability.

Benefits of replacing the breather pipe

Replacing the breather pipe serving cylinders 1–4 in the N63 engine can bring measurable operational benefits. The most important include:

• reducing the risk of "false air" intake through a leaking pipe,
• more stable operation at idle and under load,
• more predictable behavior of the air-fuel mixture control system,
• reduced load on other components of the breather system.

For high-power petrol engines such as the N63, maintaining an efficient crankcase ventilation system is one of the key elements for long-term, trouble-free operation.

Expanding BMW engine system service

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as vacuum lines, intake pipes, or additional breather hoses, check out the available parts in the Other BMW category.

If you are interested in comparing the characteristics of powerful petrol units and their accessories with solutions used in sports models of other brands, it is worth reading an article discussing the differences in engine, brake, and chassis construction – you can find it here: Audi RS vs other models – what is hidden under the hood and chassis?.