BMW 1 3 5 Series E60 E87 E90 M47N2 Oil Separator Filter Crankcase Breather

BMW 1 3 5 Series E60 E87 E90 M47N2 Oil Separator Filter Crankcase Breather is an original crankcase ventilation system component designed for BMW power units, responsible for the proper discharge of gases from the crankcase. Thanks to its factory OEM design, it ensures compatibility with the factory intake system and stable engine operation across a wide range of loads. It is a practical solution for users looking for a component matched to BMW specifications without the need for aftermarket replacements.

Specifications and technical data

• SKU: 7799224
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7799224
• Substitutable numbers: 11127799224, 7799224, 11127793163, 7793163, 11127781465, 7781465, 11127789822, 7789822
• Category: Other Engine Parts

Function and role of the engine crankcase breather

The crankcase breather in BMW engines plays a key role in controlling crankcase pressure and separating oil vapors from gases before they return to the intake system. A properly functioning component:

• stabilizes pressure in the crankcase,
• limits blow-by and unwanted oil leaks,
• supports smooth engine operation at idle and under load,
• reduces the risk of contamination of the intake manifold and valves.

For the BMW 1, 3, and 5 Series models for which this component is intended, a functional crankcase ventilation system has a direct impact on engine refinement, oil consumption, and the stability of combustion parameters.

Compatibility and fitment for BMW models

The presented crankcase breather has been designed with specific BMW generations in mind, such as the E46, E60, E87, E90, and E91. This means:

• preservation of factory connection geometry and ports,
• easier installation in place of a worn-out component,
• compatibility with original hoses and mounts in the engine bay.

As a result, the user receives a component prepared for operation in a factory BMW environment, which limits the need for modifications and adjustments to the installation.

Characteristics of the used component

The offered engine crankcase breather is a pre-owned part, which allows for an economical replacement compared to new OEM components. This type of solution is often chosen when servicing older generations of BMW, where a reasonable balance between cost and maintaining the original design is important. Replacing a worn breather with a functional used component can contribute to:

• reducing smoke and unstable idle speed,
• decreasing the risk of oil leaks from seals,
• improving the overall operation of the crankcase ventilation and intake system.

Benefits of using an original BMW crankcase ventilation system

Using an original crankcase breather instead of a worn or faulty component allows you to maintain engine performance parameters in accordance with the manufacturer's specifications. The most important advantages include:

• factory fitment for BMW engines from the E46, E60, E87, E90, E91 series,
• maintaining the manufacturer-intended flow of gases and oil vapors,
• reducing the risk of errors related to incorrect crankcase pressure,
• more predictable engine behavior over the long term of operation.

For users who service their BMW according to factory guidelines, choosing such a component is a practical way to maintain the integrity of the entire system.

Related components and technical knowledge

The crankcase ventilation system works with many other components in the engine area, such as vacuum lines, the intake manifold, or engine control elements. If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other parts from the same group, such as breather hoses, connectors, or additional mounting hardware, check out the available parts in the Other BMW category.

For a better understanding of the differences in the design and characteristics of high-performance power units and their accessories, it is worth reading material comparing solutions used in more powerful model versions. You will find useful information in the article Audi RS vs other models – what is hidden under the hood and chassis?, which discusses, among other things, the impact of engine accessories and the braking system on the car's performance characteristics.