BMW 1 3 Series E87 E90 E91 Oil Separator Petrol N46 7526654

BMW E87 E90 E91 N46 Oil Separator Crankcase Vent Valve Petrol is a component of the crankcase ventilation system, designed for N46 petrol engines in selected BMW 1 Series and 3 Series models. It is responsible for the controlled separation of oil vapors from gases before they return to the intake, which promotes stable engine operation. Thanks to the use of original BMW design, this separator ensures correct crankcase pressure and limits excessive oil consumption.

Specifications and technical data

• SKU: 7526654
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7526654
• Substitutable numbers: 11617526654, 7526654
• Fuel type: Petrol
• Category: Other Engine Parts

Function and Role of the Crankcase Vent Valve in the N46 Engine

The crankcase vent valve – oil separator in the N46 engine is responsible for separating oil mist from gases before they are reintroduced into the intake system. A properly functioning element of this type:

• stabilizes crankcase pressure,
• limits oil entering the intake manifold,
• supports smooth operation of the petrol engine at idle and under load,
• reduces the risk of carbon deposits forming in the intake.

In BMW N46 petrol engines, a functional separator is crucial for maintaining proper combustion parameters and for the longevity of engine seals.

Intended Use and Compatibility

The presented crankcase vent valve is dedicated to petrol engines equipped with the N46 engine family, installed in BMW E87, E90, and E91 models. The use of original design allows for the preservation of factory manufacturer solutions, which translates to:

• correct fit to the intake system and valve cover,
• compatibility with factory engine control,
• maintenance of the ventilation system operating parameters specified by the manufacturer.

This allows the component to be used both for standard replacement of a worn crankcase vent valve and for comprehensive servicing of the ventilation system in N46 petrol engines.

Product Characteristics and Condition

The BMW oil separator crankcase vent valve offered here comes from the Other category, meaning it is a specialized engine system component that is not part of typical wear parts groups. The product is used, which in practice means the possibility of an economical replacement while maintaining the original BMW design. This type of solution is often chosen when servicing older E87, E90, and E91 models, where a reasonable cost of maintenance is important while maintaining correct operating parameters.

Benefits of Using an Original BMW Crankcase Vent Valve

Using an original oil separator in an N46 petrol engine offers a number of practical benefits:

• Stable Engine Operation – proper crankcase ventilation reduces RPM fluctuations and mixture problems.
• Better Oil Consumption Control – limiting oil entering the intake reduces its consumption.
• Intake Component Protection – less oil in the manifold and hoses contributes to system cleanliness.
• Consistency with Original BMW Design – maintaining original geometry and gas flows.

For users who want to keep their BMW E87, E90, or E91 in good technical condition, replacing a worn crankcase vent valve with a functional element is one of the key steps in petrol engine maintenance.

Other Products and Technical Knowledge

If you are also looking for other components from the Other category for this brand, check out our offer for other BMW parts, where you will find a wide selection of components for various models and generations.

For those interested in comparing technical solutions in sporty car versions, we encourage you to read the article Audi RS vs. Other Models – What Lies Under the Hood and Chassis?, which discusses differences in engine, brake, and chassis design and their impact on operation.

If you are planning to use an older BMW for a longer period and are considering using used components when refreshing the car, the material Second Life for a Youngtimer – How Used Car Parts Revitalize Cars from 1998-2012, describing practical scenarios for modernization and servicing using aftermarket parts, may be helpful.