BMW F20 F30 N47N Diesel Air Filter Box Intake Silencer Cover 8511655

Visual condition of the part

The product shows signs of use visible in the photos.

BMW F20 F30 N47N Diesel Air Filter Box Intake Silencer Cover is an original intake system component designed for BMW F-series diesel engines. Its robust construction, perfect fit for factory mounting points, and compliance with engine specifications make it a safe service solution for intake repairs and upgrades. The housing ensures proper airflow to the engine, which translates into stable engine operation and effective filtration of contaminants.

Specifications and technical data

• SKU: 8511655-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8511655
• Substitutable numbers: 13718511655, 8511655, EM
• Fuel type: Diesel
• Color: Black
• Category: Intake Manifolds

Purpose and role in the intake system

The air filter housing in BMW F20 and F30 diesel models is responsible for the airtight routing of air from the intake to the filter element and further to the intake manifold. A properly selected housing:

• maintains proper airflow to the engine,
• ensures stable seating of the filter element,
• minimizes the risk of contaminants entering the intake system,
• contributes to the smooth operation of the diesel engine.

Thanks to its design for the specific BMW F-series generation, the component works seamlessly with the factory intake manifold and other intake parts, which facilitates installation and eliminates the need for additional modifications.

Construction and workmanship

The housing was designed as part of the Intake Manifolds system, intended for operation in the demanding conditions of a diesel engine bay. The Black color is typical for factory BMW intake components, ensuring the assembly maintains a consistent, original look. The material used is resistant to temperature and vibrations, which is crucial for long-term operation.

The layout of ports, clips, and mounting points is consistent with the factory design, allowing for precise fitment with intake ducts and body components in the engine bay. This construction reduces unwanted resonance and noise, and also facilitates servicing of the filter element.

Performance characteristics and installation

As a Used aftermarket part, the housing provides an economical alternative to a new component while maintaining original geometry and compatibility with the diesel engine. It is a practical solution in case of damage to the factory housing (cracks, broken mounts, leaks) or during a comprehensive intake system repair.

• designed for diesel units, ensuring compatibility with the airflow characteristics of diesel engines,
• factory form facilitates installation in place of the old component,
• maintaining the original air duct routing promotes stable engine performance parameters.

Before installation, it is recommended to perform a standard check of tightness and the condition of seals to fully utilize the potential of the housing in protecting the intake manifold and cylinders from contaminants.

Integration with the BMW intake system

The air filter housing works in conjunction with the intake manifold, intake ducts, and engine control system, creating a coherent airflow path. Proper fitment of the component is important not only for engine protection but also for:

• maintaining appropriate vacuum in the intake system,
• stable operation of sensors measuring airflow,
• reducing power drops resulting from leaks or air turbulence.

As a result, the housing is an important component in terms of engine durability and predictable vehicle behavior during daily use.

Related components and technical knowledge

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as intake ducts, air hoses, or additional housing components, check the available parts in the BMW Intake Manifolds category.

To deepen your knowledge about the impact of air and exhaust flow on performance and engine durability, it is worth reading the guide on the exhaust system and intake components: Performance exhaust system: used manifolds and sports catalytic converters on the road. The article helps to better understand the relationships between the manifold, the filter housing, and engine operating characteristics, which facilitates informed part selection during BMW service.