BMW F20 F21 F30 F31 LCI B48 Intake Silencer Air Filter Box Housing 8601677

BMW F20 F21 F30 F31 LCI B48 Intake Silencer Air Filter Box Housing is an original intake system component from the Intake Manifolds group, designed for BMW models with the B48 engine after the facelift (LCI). This used housing ensures factory-standard air delivery to the engine, maintaining correct flow geometry and compatibility with stock equipment.

Specifications and technical data

• SKU: 8601677
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8601677
• Substitutable numbers: 13718601677, 8601677
• Category: Intake Manifolds

Purpose and function in the intake system

The air filter housing in the B48 engine is responsible for stable, controlled air delivery to the intake manifold, while maintaining proper sealing and vibration damping. For units installed in the BMW 1 Series F20/F21 and 3 Series F30/F31 after the facelift, the correct fitment of the housing is crucial for the operation of the mass airflow sensor, other sensors, and the entire intake architecture.

Using the original housing from the Intake Manifolds group allows for maintaining engine performance parameters in accordance with the manufacturer's specifications, without the risk of unwanted air turbulence or leaks that could affect the air-fuel mixture.

Benefits of using an original BMW housing

Choosing a factory air filter housing for the B48 engine offers a number of practical advantages:

• reliable, stock fitment to the mounting points and other intake components in the engine bay,
• preservation of the air flow path intended by the manufacturer,
• compatibility with stock air filter elements,
• reduction of the risk of ECU errors resulting from incorrect air flow.

Thanks to this, the installation process is straightforward, and the intake system remains consistent with the vehicle's factory configuration, which is particularly important in modern turbocharged units.

Characteristics of the used component

The presented air filter housing is a used part, sourced from dismantling, which allows you to combine original BMW construction with a more favorable purchase cost. This type of part is a good choice for post-accident repairs, replacing a damaged housing after mechanical interference, or restoring a car to its stock configuration after intake modifications.

A used housing with preserved geometry and mounting points enables efficient installation without the need for modifications, while simultaneously supporting the maintenance of stable engine operating parameters in daily use.

Integration with the intake system and other components

The air filter housing works in conjunction with intake ducts, the intake manifold, sensors, and B48 engine accessories. A correctly selected component facilitates servicing – access to the filter element, inspection of the condition of the ducts, and potential diagnostic work within the intake area. Maintaining the original system architecture is important both from the point of view of durability and the stability of combustion parameters.

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 intake ducts, air hoses, or additional housing elements, check out the available parts in the BMW Intake Manifolds category.

More about intake and exhaust systems

For a fuller understanding of the impact of air flow on the performance and operating characteristics of the power unit, it is worth familiarizing yourself with materials regarding the modification and selection of intake and exhaust components. Practical tips on used manifolds and performance components can be found in the article Performance exhaust system: used manifolds and sports catalytic converters on the road.