BMW E90 E91 M47N2 Air Intake Duct Guide Tube Suction Hood 7790605

Visual condition of the part

The product shows signs of use visible in the photos.

BMW E90 E91 M47N2 Air Intake Duct Guide Tube Suction Hood is an original air intake system component responsible for the stable guidance of the airflow from the hood inlet to the subsequent intake components. Thanks to its factory geometry and fitment, it ensures proper operation of the M47N2 diesel engine and reduces the risk of performance drops resulting from leaks or incorrect airflow. This is a practical solution for users who want to restore the factory performance parameters of the power unit after the original duct has been damaged.

Specifications and technical data

• SKU: 7790605-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7790605
• Substitutable numbers: 13717790605, 7790605
• Category: Other Air & Fuel Delivery

Function and role of the intake duct

The intake duct in BMW 3 Series E90/E91 models with the M47N2 engine is responsible for directing air from the hood area to the rest of the intake system. A properly shaped duct:

• stabilizes airflow at various driving speeds,
• reduces turbulence that can affect the operation of the mass air flow sensor and engine control unit,
• helps maintain consistent power unit supply conditions,
• minimizes the risk of drawing in contaminants from the engine bay.

As a result, the intake system maintains its factory characteristics, and the engine can operate under stable conditions, which helps maintain proper dynamics and smooth operation.

Compatibility and fitment for BMW E90/E91 M47N2

The offered component has been designed specifically for the intake system of the BMW 3 Series E90 and E91 generations with the M47N2 unit. This means that:

• its shape and mounting points are adapted to the factory engine bay layout,
• it fits standard brackets, covers, and adjacent intake components,
• it does not require modifications or adjustments during installation.

Such a solution allows for maintaining the integrity of the entire air intake system, which is particularly important when operating the vehicle in diverse road conditions.

Characteristics of the original BMW part

As a component originating from the BMW production line, the intake duct provides:

• factory fitment with other components of the intake system,
• preservation of the original rigidity and geometry of the air channel,
• compatibility with standard covers and guides in the engine bay.

Choosing an original intake duct is particularly beneficial in the case of accident repairs or replacing components after long-term use, when the goal is to maintain factory engine performance parameters and proper interaction with the control electronics.

Condition, application, and benefits of installation

The offered intake duct is a used part, which allows for an economical restoration of the air intake system's efficiency while maintaining the original design. This type of part is suitable in situations where the existing duct:

• has cracked or deformed,
• has been mechanically damaged during a collision or service work,
• shows leaks that affect engine performance.

Installing an original intake duct reduces the risk of improper fitment that may occur when using aftermarket parts with different geometry. This is a practical solution for users who value structural consistency and predictable vehicle behavior.

Intake system expansion and BMW parts offer

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 additional air ducts, intake covers, or air guides, check the available parts in the Other BMW category.

For drivers interested in comparing the characteristics of sports power units with factory designs and optimizing the selection of intake system components and engine accessories, a valuable addition to your knowledge will be the article Audi RS vs other models – what is hidden under the hood and chassis?, which discusses the differences in engine, brake, and chassis construction, as well as the importance of properly selected service parts.