Filter Housing BMW E90 E91 Pollen Cabin Microfilter Bottom Part Cover 6924277

Visual condition of the part

The product shows signs of use visible in the photos.

Filter Housing BMW E90 E91 Pollen Cabin Microfilter Bottom Part Cover is a ventilation system component responsible for the stable seating of the cabin microfilter and sealing the cowl area. Thanks to the original BMW design, this part ensures proper airflow through the pollen filter, which translates into efficient operation of the ventilation and air conditioning system and comfort in the cabin.

Specifications and technical data

• SKU: 6924277-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6924277
• Substitutable numbers: 64316924277, 6924277
• Category: Pollen Filters

Purpose and technical function

The bottom microfilter housing in BMW 3 Series E90/E91 models operates in the immediate vicinity of the windshield and engine compartment, creating a sealed housing for the cabin filter. It is responsible for:

• stable support of the pollen filter insert,
• limiting the ingress of contaminants into the ventilation ducts,
• draining moisture from the cowl area,
• maintaining the correct airflow geometry into the vehicle interior.

A properly selected microfilter housing helps maintain the efficiency of the ventilation and air conditioning system, which is important for both driving comfort and the durability of other system components.

Construction and fitment for BMW E90/E91

The offered housing is designed as part of the original BMW cowl architecture, ensuring it retains factory mounting points and a shape tailored to the E90/E91 body. This allows for:

• precise fitment with other cowl components,
• correct positioning of seals and air ducts,
• seamless compatibility with the standard cabin microfilter.

Such a solution minimizes the risk of leaks, unwanted air noise, and accelerated contamination of the ventilation system interior.

Performance characteristics and installation

This element from the Cabin and pollen filters category plays a key supporting role – without a functional housing, even a new filter will not operate under optimal conditions. In practice, this means that:

• replacing a damaged or deformed housing improves system tightness,
• a properly secured microfilter more effectively traps dust, pollen, and allergens,
• the risk of window fogging resulting from uncontrolled moisture ingress is reduced.

The housing is intended for installation in place of the factory element, which facilitates service work and allows for maintaining the original BMW cowl geometry.

Product condition and benefits of choosing a used part

The offered microfilter housing comes from the used parts segment, which allows for combining reasonable cost with the preservation of the original BMW design. For many users, this is a practical solution for maintenance repairs in older 3 Series generations, where both functionality and service economy are important.

Before installation, it is recommended to perform a standard visual inspection of the element and the seals in the cowl area, as well as to verify the correct seating of the cabin filter insert after assembling the entire system.

If you are planning a comprehensive repair or upgrade of the ventilation and cowl area in your BMW and need other components from the same group, such as cabin filter inserts, mounting frames, or additional cowl covers, check the available parts in the BMW cabin and pollen filters category.

To better plan the use of aftermarket components in your car and take a conscious approach to choosing used parts, it is worth reading the guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?