BMW F30 F31 F32 LCI N57N N57Z Diesel Air Filter Box Silencer Cover 8573869

Visual condition of the part 

The product shows signs of use visible in the photos. 

BMW F30 F31 F32 LCI N57N N57Z Diesel Air Filter Box Silencer Cover is a factory-original intake system component designed for BMW diesel models. It ensures stable mounting of the filter element and effective separation of the filter housing from other engine bay components. As a result, the air intake system operates in a more predictable, sealed, and durability-optimized manner.

Specifications and technical data

• SKU: 8573869-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8573869
• Substitutable numbers: 13718573869, 8573869
• Fuel type: Diesel
• Category: Air Filter Housings

Purpose and function in the intake system

The presented air filter box silencer cover is designed for Diesel engines used in the BMW F30, F31, and F32 series after the LCI facelift with N57N and N57Z engines. The component is responsible for maintaining proper air flow geometry, protecting the filter element from engine bay contaminants, and limiting the impact of heat on the intake air.

A properly selected air filter box cover helps maintain stable engine performance, supports uniform cylinder filling, and promotes the maintenance of correct air-fuel mixture values across the entire load range. This is significant for both vehicle dynamics and the refinement and longevity of the diesel engine.

Construction and fitment for BMW F30 F31 F32 LCI

The cover belongs to the Air filter housings group and is manufactured to the vehicle manufacturer's standards. The design features factory mounting points and a shape tailored to the intake system and engine bay layout of the facelifted BMW F30, F31, and F32 models. This ensures that installation is straightforward, without the need to modify adjacent components.

The properly formed surfaces of the cover stabilize the filter element and reduce the risk of it shifting during engine operation or while driving over uneven surfaces. Maintaining a seal within the air filter housing is crucial for protecting the turbocharger and fuel injection system components from solid particles entering the engine.

Benefits of using an original cover

Using an original air filter box cover in BMW diesel vehicles with the N57N / N57Z engine allows for the maintenance of factory air flow parameters and compliance with the manufacturer's design specifications. This is particularly important in turbocharged units, where any leaking or deformed intake component can affect the operation of the forced induction system and fuel injection control.

The main advantages of using this component include:

• maintaining a stable position of the air filter in the housing,
• reducing the ingress of contaminants from the engine bay into the intake system,
• preserving the air flow geometry intended by the manufacturer,
• better protection for components cooperating with the intake system.

Characteristics of the used component

The offered air filter box cover is a dismantled, used part. This means it may show signs of wear typical for a component operating in an engine bay, while still maintaining its structural functionality. For many users, this is a reasonable compromise between purchase cost and maintaining the original manufacturer's specifications.

Choosing a used component from the Air filter housings group allows you to restore the proper operation of the intake system in the event of damage, cracking, or deformation of the existing cover, without the need to invest in a new part.

Related components and additional information

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 covers, lower housing parts, or air intake ducts, check the available parts in the BMW Air filter housings category.

When working on the intake system and engine, it is also worth paying attention to the general condition of the engine and its accessories – helpful tips on the safe selection of components can be found in the article Buying a used engine: 5 things you must check before installation.

Summary

BMW F30 F31 F32 LCI N57N N57Z Diesel Air Filter Box Silencer Cover is a practical choice for users who want to restore the proper operation of the intake system in their diesel vehicle. A properly selected, original component from the air filter housing group helps protect the engine, maintain stable performance, and ensure compliance with the vehicle's factory design.