BMW 3 4 Series F30 F31 F80 M3 F82 M4 Rear Ventilation Boot Vent Cassette Filter

BMW 3 4 Series F30 F31 F80 M3 F82 M4 Rear Ventilation Boot Vent Cassette Filter is an original body ventilation system component designed for installation in the rear section of BMW F-series vehicles. Thanks to its precise fitment to the bodywork, it ensures stable air extraction from the cabin, supporting proper circulation and reducing unwanted turbulence. This is a practical solution for users who want to maintain the factory functionality and structural integrity of their vehicle.

Specifications and technical data

• SKU: 9176945
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9176945
• Substitutable numbers: 64229176945, 9176945
• Location on the vehicle: Rear
• Category: Other Interior Parts & Accessories

Purpose and function of the ventilation grille

The presented ventilation grille is a body ventilation system component mounted in the rear part of the vehicle. Its task is to provide controlled air extraction from the cabin to the outside, which supports:

• maintaining stable pressure inside the body,
• smooth closing of doors and the trunk lid,
• reducing window fogging by improving airflow,
• reducing unwanted noise and turbulence in the rear zone.

Thanks to its factory geometry, the grille works with existing air ducts and body contours, which allows for maintaining the airflow characteristics designed by BMW.

Fitment for BMW F-series models

BMW 3 4 Series F30 F31 F80 M3 F82 M4 Rear Ventilation Boot Vent Cassette Filter has been designed specifically for the F-platform, including sedan, touring, and M sports versions. This means that the shape, mounting points, and outline of the component are consistent with the factory mounting slots in the body.

Such fitment translates into:

• secure seating in the mounting hole without the need for modifications,
• maintaining tightness in the rear body area,
• consistent exterior appearance in line with the original BMW design.

Characteristics of the used component

The offered grille comes from the secondary market, which allows combining factory origin with a more favorable purchase cost compared to a new component. The used element retains its original construction, making it a proper alternative to replacements with uncertain fitment.

Choosing parts from the secondary market is particularly beneficial for post-accident repairs, replacing missing body components, or restoring the car to a factory-like state after modifications.

Benefits of using the original rear grille

Using an original ventilation grille in the rear of a BMW F-series provides a number of practical benefits:

• Structural compatibility – the element is designed for a specific platform, which minimizes the risk of leaks and assembly problems.
• Stable ventilation system operation – maintaining factory airflow promotes cabin comfort.
• Consistency with other body components – the grille does not disturb the body lines or the operation of adjacent elements.

For users who care about the technical correctness of repairs and the aesthetic consistency of the vehicle, this is a solution that allows maintaining the parameters intended by the manufacturer.

Related components and technical materials

If you are planning a comprehensive repair or upgrade of the rear zone in your BMW and need other elements from the same group, such as additional ventilation grilles, airflow covers, or small mounting parts, check the available parts in the Other BMW category.

To compare design solutions used in different brands and sports segments, it is worth reading the material describing the differences in the construction of powertrains and chassis – you will find them in the article Audi RS vs other models – what is hidden under the hood and chassis?, which discusses, among other things, the manufacturers' approach to high-load components.