BMW E90 LCI F10 F20 F21 F30 Diesel N47N Air Inlet Intake Manifold 7807991

BMW E90 LCI F10 F20 F21 F30 Diesel N47N Air Inlet Intake Manifold is an original air supply system component designed for BMW N47N family diesel engines. Thanks to its factory geometry and precise fitment to the cylinder head, it ensures stable operating conditions for the power unit, supporting uniform cylinder filling and proper engine control unit operation. It is a practical solution for users looking for a proven, used component with maintained functionality.

Specifications and technical data

• SKU: 7807991-5
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7807991
• Substitutable numbers: 11617807991, 7807991
• Fuel type: Diesel
• Category: Intake Manifolds

Purpose and compatibility with the Diesel N47N engine

The intake manifold in this version has been designed specifically for Diesel N47N units used in popular BMW 1, 3, and 5 series models. The manifold's construction is adapted to the airflow characteristics of a diesel engine, which allows for maintaining correct boost pressures, stable idling, and predictable throttle response across the entire rev range.

Properly shaped intake ports support even air distribution between cylinders, which is important for both engine refinement and durability. Using an original manifold instead of a worn or damaged part helps restore factory engine performance without the need for system modifications.

Construction and function of the intake manifold

This manifold belongs to the group of components known as Intake manifolds, responsible for delivering the correct amount of air to the combustion chamber. Its tasks include:

• guiding air from the intake system to individual cylinders,
• maintaining a seal between the intake system and the engine cylinder head,
• ensuring stable flow conditions under various engine loads,
• working in conjunction with the diesel unit's control equipment.

Thanks to its factory design, the manifold works in harmony with the engine control unit maps, which reduces the risk of adaptation problems, diagnostic errors, or uneven engine operation. Using an original solution is particularly important in modern diesels, where airflow precision has a direct impact on exhaust emissions and fuel consumption.

Practical application and benefits of installation

Replacing the intake manifold is recommended in situations where symptoms such as power loss, uneven engine operation, leaks in the intake system, or adaptation problems after other repairs occur. Installing an original BMW component allows you to:

• maintain compliance with factory engine performance parameters,
• minimize the risk of leaks and uncontrolled air intake,
• facilitate computer diagnostics thanks to the predictable behavior of the intake system,
• limit the need for additional mechanical modifications.

A used intake manifold is a reasonable alternative to new, expensive components, especially for maintenance repairs in high-mileage cars. It allows you to maintain the efficiency of the intake system at controlled service costs.

BMW brand and intake system fitment

Original BMW solutions are designed for full integration with other intake system components, such as hoses, sensors, or the air filter housing. As a result, the intake manifold designed for E90 LCI, F10, F20, F21, and F30 models works with factory equipment without the need for adapters or mounting modifications.

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 additional manifolds, intake elements, or related components, check out the available parts in the BMW Intake Manifolds category.

More about intake and exhaust systems

When working on the air supply system, it is worth looking at the entire gas flow path in the car – from the intake to the exhaust. A well-chosen intake manifold combined with a properly configured exhaust system affects torque characteristics, throttle response, and engine refinement. If you want to better understand the relationship between the manifold and the rest of the system, check out the article Performance exhaust system: used manifolds and sports catalytic converters on the road, where you will find practical tips on choosing used manifolds for BMW cars and other brands.

Summary

BMW E90 LCI F10 F20 F21 F30 Diesel N47N Air Inlet Intake Manifold is a functional, used intake system component designed for modern BMW diesel engines. It ensures factory fitment, supports stable power unit operation, and allows for an economical repair or replacement of a worn manifold without sacrificing the manufacturer's original design.