BMW 3 Series 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 3 Series E90 E91 M47N2 Air Intake Duct Guide Tube Suction Hood is an original air supply system component designed for 3 Series models with the M47N2 engine. It ensures stable airflow guidance to the intake, which promotes smooth engine operation and proper integration with the factory BMW intake system. By maintaining the factory geometry, this solution is particularly beneficial for repairs and restoring the engine's original performance parameters.

Specifications and technical data

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

Purpose and function in the intake system

The presented air intake is a component of the intake system responsible for directing and stabilizing airflow within the engine bay. In BMW 3 Series E90 and E91 vehicles with the M47N2 unit, it works in conjunction with the factory filter housing and other intake components, allowing for the maintenance of standard cylinder filling parameters and correct turbocharger operation characteristics.

The properly shaped intake cross-section reduces turbulence and pressure drops, which is essential for both the dynamics and the refinement of the diesel engine. Using an original component helps avoid issues with poor fitment, leaks, or unwanted resonances in the intake system.

Benefits of using an original BMW air intake

Choosing a factory air intake for the BMW E90/E91 M47N2 is a solution that technically and practically outperforms many aftermarket replacements. Key advantages include:

• Precise fitment to the engine bay – maintaining original mounting points and geometry facilitates installation and eliminates the need for modifications.
• Consistency with the factory intake system – compatibility with the stock filter housing, air ducts, and engine bay covers.
• Stable airflow – a design engineered specifically for the M47N2 engine promotes predictable engine performance across the full load range.
• Maintaining original parameters – using an original component helps preserve factory torque characteristics and fuel consumption levels.

Condition, installation, and service application

The item comes from a used vehicle, making it an attractive cost-effective alternative while maintaining original BMW specifications. This type of air intake is particularly useful for:

• post-collision repairs where components in the front part of the engine bay were damaged,
• servicing the intake system after identifying cracks, deformations, or leaks in the existing intake,
• restoring the factory configuration after previous intake modifications.

Installation is based on factory mounting points on the body and adjacent intake system components, which reduces service time and minimizes the risk of installation errors.

Integration with other BMW components and technical knowledge

For BMW 3 Series vehicles where broader modernization of the air supply system or engine accessories is planned, it is worth relying on proven solutions and reliable technical knowledge. When planning modifications or repairs within BMW engines, the practical Global Parts guide may be helpful – check out the article BMW B58 Code – checklist before buying a turbocharger and intercooler for the BMW 3 Series (G20), which shows how to approach component selection, OEM verification, and compatibility using another 3 Series generation as an example.

If you are interested in comparing the characteristics of sports versions of premium models with their standard variants in terms of engine, brakes, and chassis, the Global Parts material will be helpful – see the comparison of Audi RS with other models in terms of engines and chassis, which allows for a better understanding of the relationships between accessory design and performance.

Expanding repairs within the BMW intake system

If you are planning a comprehensive repair or modernization of the engine area in your BMW and need other elements from the same group, such as intake ducts, air filter housings, or additional air supply hoses, check the available parts in the Other BMW category.