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

The BMW F30 N57N N57Z Air Filter Housing is an original intake system component designed for BMW 3 Series F30 diesel engines with N57N and N57Z units. This used air filter housing ensures factory-standard airflow, contributing to the stable operation of a turbocharged diesel engine. It's a solution for users who expect proven intake geometry and compatibility with factory mounting points.

Specifications and technical data

• SKU: 8573869-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8573869
• Substitutable numbers: 13718573869, 8573869, KZ
• Fuel type: Diesel
• Category: Air Filter Housings

Intended Use and Function in the Intake System

The air filter housing in BMW F30 with N57N/N57Z engines is responsible for securely holding the filter element and directing air correctly to the mass airflow sensor and intake manifold. This is particularly important in a Diesel engine due to high boost pressure and the system's sensitivity to leaks and air turbulence.

Using an original housing helps maintain:

• proper intake system seal,
• stable mass airflow sensor parameters,
• adequate noise damping for intake air,
• factory mounting points to the body and intake pipes.

Construction and Fitment for BMW F30

The air filter housing offered here belongs to the Air Filter Housings category and has been specifically designed for the engine bay of the BMW F30 with N57N/N57Z units. The body shape, connection ports, and mounting brackets are tailored to the stock intake system, facilitating installation without modifications.

Key functional features:

• compatibility with the stock air filter element for N57N/N57Z engines,
• preservation of the original airflow path from the inlet to the turbocharger,
• possibility to use factory clamps, bolts, and mountings,
• construction prepared for operation in the demanding thermal conditions of a diesel engine bay.

Benefits of Using an Original Air Filter Housing

Using an original air filter housing in a BMW F30 diesel engine translates into a range of practical operational benefits. Maintaining the factory intake geometry helps reduce power losses resulting from improper airflow and minimizes the risk of contaminants entering the intake system.

The most significant advantages include:

• stable operation of the turbocharged diesel engine thanks to predictable airflow,
• easy serviceability – quick filter element replacement in the original housing,
• preservation of the intake system's factory acoustic parameters,
• reduced risk of air mass sensor errors caused by non-factory modifications.

Condition, Verification, and Practical Application

The offered air filter housing is a used part, which for body and intake system components often represents a sensible compromise between cost and functionality. Such a component, if it maintains its seal and undamaged mounting points, can be reliably used for a long time in a diesel engine.

Before installation, it is recommended to:

• check the condition of seals and replace them with new ones if necessary,
• verify the filter element seat for cleanliness,
• inspect ports and mountings for cracks or deformation,
• install with a new air filter element suitable for the N57N/N57Z engine.

Other BMW Air Filter Housings and Technical Knowledge

If you are looking for other BMW Air Filter Housings for different models of this brand, check out the BMW air filter housings available in our store to find a part that perfectly matches your specific engine version.

For users interested in a broader technical context, including the impact of the intake system on all-wheel-drive performance and the operation of diesel vehicles, we recommend the guide article xDrive, 4Matic, quattro, or 4Motion – Comparison of AWD Systems from BMW, Mercedes, Audi, and VW, which discusses, among other things, the specifics of servicing key components in all-wheel-drive vehicles.