BMW E90 E91 Diesel N47 Engine Air Intake Suction Duct Hood 7798772

Visual condition of the part

The product shows signs of use visible in the photos.

BMW E90 E91 Diesel N47 Engine Air Intake Suction Duct Hood is an original air supply system component for diesel engines, specifically designed for the N47 unit in the facelift version. The precisely shaped duct ensures stable airflow to the intake manifold, which promotes smooth diesel engine operation and reduces performance drops. Thanks to its factory geometry and perfect fitment in the engine bay, it serves as a safe service solution for repairs and replacements of intake components.

Specifications and technical data

• SKU: 7798772-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7798772
• Substitutable numbers: 13717798772, 7798772, 13717811906, 7811906, KZ
• Fuel type: Diesel
• Part type: Line
• Category: Hoses, Lines & Pipes

Purpose and function in the intake system

The air intake suction duct in the N47 engine is responsible for controlled airflow from the intake system towards the power unit. The properly selected cross-section and shape minimize turbulence, which helps maintain stable cylinder filling conditions in the diesel engine. The correct operation of this component affects:

• proper engine response to load,
• maintaining smooth idle operation,
• reducing power drops resulting from leaks or duct deformation,
• stable conditions for the operation of intake-related accessories.

Construction and fitment for BMW E90 LCI with N47 engine

The component has been designed as part of the Lines, hoses and pipes system, with a focus on a precise fit in the engine bay of the BMW E90 LCI with the N47 unit. The factory design ensures:

• compatibility with mounting points on the body and engine accessories,
• proper routing relative to other lines and hoses in the engine bay,
• compatibility with the air supply system in the diesel engine.

As a result, the duct can be integrated into the existing system without the need for modifications, which is particularly important when servicing diesel vehicles, where the tightness and geometry of the intake are crucial for the engine's performance.

Benefits of using an original intake duct

Using an original air intake suction duct in a BMW with an N47 engine allows you to maintain the parameters specified by the manufacturer. In practice, this means:

• reliable fitment with other intake system components,
• reduced risk of leaks compared to generic aftermarket replacements,
• maintaining predictable diesel engine operating conditions across various load ranges.

A used OEM component is often a sensible choice for maintenance repairs when you want to preserve the factory design of the system while optimizing service costs.

Condition, verification and service application

The offered duct comes from disassembly and has the status of a used component, which in practice means it was previously operated in a vehicle but is suitable for further use after proper installation. This type of part is particularly useful for:

• post-collision repairs where the intake system was damaged,
• eliminating leaks and issues with air supply to the engine,
• comprehensive maintenance of the N47 unit in a diesel-powered BMW E90 LCI.

Before installation, a standard visual inspection and verification of compatibility with your vehicle based on the OEM part number and available interchangeable numbers in the technical specification are recommended.

Expanding the BMW intake system – related components

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as additional lines, hoses, or intake pipes, check out the available parts in the BMW lines, hoses and pipes category.

For larger work within the drivetrain, it is also worth considering the selection of appropriate final drive and differential components – you will find more practical tips in the article Humming differential? Find out why a used OEM final drive is a better investment than an uncertain replacement, which will help you consciously plan further repairs for your car.