BMW E81 E88 E90 E91 N47 Intake Manifold Without Flap Control 8507240

BMW E81 E88 E90 E91 N47 Intake Manifold Without Flap Control is a factory intake system component designed for BMW 1 and 3 series diesel engines with the N47 unit. The original manifold design ensures stable cylinder filling conditions, which translates into repeatable performance, proper idle operation, and predictable throttle response. Choosing a used OEM manifold is a sensible way to maintain the factory performance parameters of a diesel engine while keeping repair costs under control.

Specifications and technical data

• SKU: 8507240
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8507240
• Substitutable numbers: 8507240, 11618507240, 7811215, 11617811215, 7798885, 11617798885
• Fuel type: Diesel
• Category: Intake Manifolds

Purpose and role in the intake system

The intake manifold in the N47 engine is responsible for the even distribution of air to all cylinders, which is crucial for stable combustion in diesel units. For the BMW E81, E88, E90, and E91 series, a correctly selected manifold allows for maintaining the factory torque characteristics, engine refinement, and proper cooperation with the turbocharging system and the engine control unit.

The item from the Intake Manifolds category has a direct impact on:

• proper cylinder air filling across the entire rev range,
• stability of diesel engine operation when cold and warm,
• effective cooperation with the exhaust gas recirculation and turbocharging system,
• maintaining factory fuel consumption parameters.

Benefits of using an original BMW manifold

Using an original BMW intake manifold in the N47 engine allows for compliance with the vehicle's factory specifications. This means proper fitment to the cylinder head, correct positioning of ports and mounts, and predictable behavior during long-term operation. A used OEM component is particularly beneficial for repairs where the following matters:

• maintaining the original geometry of the intake channels,
• compatibility with engine accessories intended for the N47 unit,
• reducing the risk of fitment issues typical of low-quality replacements,
• the possibility of economical repair while maintaining factory parameters.

For users who expect predictable engine behavior, installing an original intake manifold is a technically safe solution that is consistent with the manufacturer's design.

Technical characteristics in the context of a diesel engine

BMW N47 family diesel engines are sensitive to the tightness and patency of the intake system. An intake manifold designed specifically for a diesel unit ensures proper airflow, taking into account the specifics of operation under higher boost pressure and cooperation with the engine control system. A properly selected manifold helps to reduce:

• power drops resulting from intake leaks,
• uneven idle operation caused by flow disturbances,
• problems with ECU adaptation after replacing intake components.

As a result, replacing a worn or damaged manifold with an original component intended for a diesel engine allows for restoring proper engine operating conditions without the need to interfere with factory control maps.

Practical application and part selection

When selecting an intake manifold for a BMW 1 and 3 series with an N47 engine, it is crucial to rely on vehicle identification data and part numbers. The product has an assigned OEM number and interchangeable numbers, which facilitates verifying compatibility with a specific engine version and vehicle year. In practice, this means the possibility of precisely matching the component to the factory configuration without the need for accessory modifications.

It is worth comparing the markings with service documentation or the existing component before purchase to ensure that the manifold will work with the current intake system, sensors, and engine control unit.

Expanding knowledge and selecting other components

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other items from the same group, such as additional manifolds, intake elements, or related components, check the available parts in the BMW Intake Manifolds category.

For drivers interested in a broader perspective on the impact of flow components on performance and engine characteristics, we recommend an article describing the practical aspects of selecting and operating used exhaust and air flow components: Performance exhaust system: used manifolds and sports catalytic converters on the road.

If you are considering further vehicle modifications using used components, including those related to air and exhaust flow, a guide describing a safe approach to such upgrades may also be helpful: Tuning with used parts – how to gain performance without spending a fortune.