BMW E81 E87 LCI E90 E91 N47 Air Filter Box Housing Cover Diesel 7797460

BMW E81 E87 LCI E90 E91 N47 Air Filter Box Housing Cover is a factory intake system component designed for BMW 1 and 3 Series diesel engines. It ensures stable airflow to the diesel engine, which promotes smooth operation of the power unit and proper filtration of contaminants. By maintaining the original housing geometry, it is possible to preserve the correct airflow parameters and ensure proper seating of the filter element.

Specifications and technical data

• SKU: 7797460-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7797460
• Substitutable numbers: 7797460, 13717797460
• Fuel type: Diesel
• Category: Air Filter Housings

Purpose and function in the intake system

The air filter housing in BMW models with a Diesel engine is responsible for tightly sealing the filter element and directing the air sucked into the intake manifold. A properly selected housing minimizes pressure drops in the intake, limits the ingress of dust and particles into the engine, and supports the stable operation of the mass air flow sensor and other auxiliary components.

In the case of N47 units, the correct housing is particularly important for uniform cylinder filling, which translates into engine refinement, fuel consumption, and exhaust emissions. Using the original design allows for maintaining factory flow parameters without the risk of uncontrolled turbulence or leaks.

Benefits of using an original BMW housing

Using an original BMW air filter housing ensures a perfect fit to the factory mounting points in the engine bay and compatibility with the stock intake system. As a result, installation is straightforward and predictable, without the need for modifications to brackets, hoses, or connectors.

• Stable mounting of the filter element and intake hoses.
• Reduction of unfiltered air entering the engine.
• Maintenance of factory airflow characteristics.
• Consistency with other diesel engine auxiliary components.

By maintaining the original design, the housing works seamlessly with stock intake components, which helps maintain predictable engine performance and facilitates potential diagnostics.

Condition, fitment, and installation aspects

The presented housing belongs to the Air filter housings category and is a used part, which allows for an economical repair of the intake system while maintaining original BMW specifications. This type of solution is particularly beneficial in cases of mechanical damage, cracks, or broken mounts in the previously installed housing.

Before installation, it is recommended to perform a standard verification of tightness, the condition of seals, and the contact surfaces with intake hoses and the filter element. A properly prepared housing allows for installation in a configuration close to the factory standard, which helps maintain adequate engine protection against contaminants sucked in from the environment.

Application in BMW Diesel engines

The housing has been designed for BMW diesel units, where the quality of air filtration has a significant impact on the durability of the injection system, turbocharger, and internal engine components. Precise airflow guidance through the housing supports uniform cylinder loading and stable operation across a wide range of loads, from city driving to long-distance trips.

A properly selected air filter housing helps reduce the risk of solid particles entering the combustion chamber, which in the long run translates into less wear on mating parts and more predictable diesel engine performance.

Expanding the BMW intake system

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 housings, intake ducts, or mounting elements, check out the available parts in the BMW Air filter housings category.

When choosing between new parts, replacements, or used parts, it is worth analyzing the differences in costs, build quality, and fitment for a specific model – the article Original, replacement, or used – which car parts are the most cost-effective? may be helpful, as it discusses the practical aspects of selecting parts based on OEM numbers and technical specifications.