BMW 3 4 F30 F31 F32 LCI N57N N57Z Diesel Air Filter Box Intake Silencer 8573869

The BMW F30 F32 N57N Filter Air Filter Housing is an original housing from the Air Filter Housings category, designed for modern BMW diesel engines. This component ensures proper guidance and stable seating of the filter element, which translates to efficient airflow to the diesel engine and correct operation of the intake system.

Specifications and technical data

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

Purpose and Function in the Intake System

The air filter housing in BMW models with the N57N engine is responsible for the airtight channeling of air from the intake duct to the intake manifold. A correctly selected housing:

• maintains the filter element in a stable position,
• ensures the airtightness of the intake system,
• limits the ingress of contaminants into the engine,
• supports uniform airflow under various loads of the diesel engine.

This allows the diesel engine to maintain proper running characteristics, and combustion parameters remain stable.

Benefits of Using an Original BMW Housing

The original BMW air filter housing has been designed specifically for the engine bay geometry and airflow characteristics of the N57N unit. In practice, this means:

• precise fit to the factory mounting points in the F30 and F32 body,
• maintenance of the stock intake characteristics, without unwanted turbulence,
• compatibility with stock intake pipes and sensors,
• easier installation and removal during air filter servicing.

Using an original housing allows for the maintenance of the factory intake system configuration, which is particularly important in modern diesel engines with complex electronic control.

Characteristics of a Used Component

The presented air filter housing is a used part, sourced from disassembly. Such components often retain full functionality, as they are not as subject to wear and tear as the filter element itself. In practice, this means the possibility of:

• economical repair of a damaged or cracked housing,
• restoring proper intake system airtightness,
• reducing service costs while maintaining OEM parts.

Before installation, a standard visual inspection and replacement of the air filter element with a new one, in accordance with the manufacturer's recommendations, are advised.

Compatibility with Diesel Engines

The housing has been designed to work with diesel units, so its geometry and intake duct cross-sections are adapted to the airflow characteristics of a diesel engine. A correctly selected housing:

• supports stable boost pressure and mass airflow values,
• reduces the risk of leaks affecting sensor readings,
• helps maintain correct operating parameters for the turbocharger and exhaust gas recirculation system.

This ensures that the entire intake system works cohesively with the engine control unit's software, which is important for both performance and the longevity of the powertrain.

BMW Air Filter Housings – Selection and Alternatives

If you are looking for other BMW Air Filter Housings for your car, check out the BMW air filter housings available in our store to select a component that matches your specific engine version and body type.

Related Technical Topics

In modern diesel engines, the exhaust gas recirculation system plays an important role alongside the intake system and air filter. If you want to better understand how it interacts with the diesel engine and when it's worth considering used parts, check out the article EGR: What it is and why consider used EGR valves, which discusses this topic in detail.