BMW F10 F11 F20 F21 F30 F31 N20 Oil Separator Crankcase Vent Valve Pipe Hose

BMW F10 F11 F20 F21 F30 F31 N20 Oil Separator Crankcase Vent Valve Pipe Hose is an original crankcase ventilation system component designed for N20 engines in F10, F11, F20, F21, F30, and F31 models. Engineered by BMW, it ensures proper evacuation of oil vapors from the crankcase, which promotes stable engine operation and reduces the risk of unwanted leaks.

Specifications and technical data

• SKU: 7598091
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7598091
• Substitutable numbers: 11127598091, 7598091, KZ
• Category: Other Engine Parts

Purpose and function in the N20 engine

This crankcase ventilation pipe is responsible for the controlled discharge of gases from the crankcase in the N20 engine, directing them into the intake system according to the factory BMW design. A properly functioning component of this type:

• stabilizes crankcase pressure,
• reduces blow-by and excessive oil contamination in the intake,
• supports smooth engine operation across the full load range.

By maintaining the original geometry and pipe diameters, oil vapor flow remains consistent with the manufacturer's specifications, which is particularly important in modern, turbocharged N20 units.

Compatibility with BMW F-series models

The BMW N20 engine crankcase vent pipe has been developed for the F10, F11, F20, F21, F30, and F31 platforms. This means it is compatible with popular 3 Series and 5 Series models, as well as the compact 1 Series that utilize this engine. Using an original BMW component allows you to maintain:

• proper routing of the pipe in the engine bay,
• compatibility with factory mounts and connectors,
• consistency with other ventilation system components.

For users who are upgrading or servicing the crankcase ventilation system in their BMW, choosing an original pipe is a safe and technically predictable solution.

Characteristics of the used component

The offered pipe is a used component, sourced from vehicle dismantling, which allows for a balance between reasonable cost and maintaining original BMW specifications. This type of part is particularly attractive for engine auxiliary systems, where proper fitment and compliance with the factory design are essential. A used OEM component:

• enables cost-effective repair of the ventilation system,
• retains original shapes and connections,
• reduces the risk of installation issues typical of cheap aftermarket replacements.

Benefits of using an original crankcase vent pipe

Using an original crankcase ventilation pipe in the N20 engine provides a number of practical operational benefits. The most important include:

• Stable engine operation – proper crankcase ventilation promotes smooth engine performance, especially under higher loads.
• Reduced intake contamination – proper oil vapor flow reduces the risk of excessive oil buildup in the intake system.
• Factory fitment – the original BMW component minimizes the need for modifications and speeds up installation.

For workshops specializing in BMW service and informed users who want to maintain engine system integrity, this is a technically sound and predictable solution for long-term operation.

Ecology and the choice of used parts

Choosing an original, used part from dismantling is not only a cost saving but also real support for sustainable automotive practices. Reusing functional components reduces the demand for new raw materials and decreases waste. If you want to better understand how such decisions affect the environment, it is worth reading the article on the impact of original used parts on the carbon footprint in the automotive industry.

Related categories and technical knowledge

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as vacuum lines, ventilation system components, or small mounting parts, check out the available parts in the Other BMW category.

For a comparison of technical solutions used in different brands and sports versions, you can also refer to the guide discussing the structural differences between Audi RS models and standard versions, which shows how manufacturers design engines, braking systems, and chassis in high-performance cars.