BMW Z4 E85 E86 E89 Rear Ventilation Boot Vent Cassette Filter 6909340

BMW Z4 E85 E86 E89 Rear Ventilation Boot Vent Cassette Filter is an original body ventilation system component designed for installation in the rear of the vehicle. It ensures controlled airflow, supports proper cabin ventilation, and helps maintain stable pressure conditions inside the body. This is a practical solution for users who want to restore the efficiency of the ventilation system in their BMW Z4 E85 in a functional and factory-compliant manner.

Specifications and technical data

• SKU: 6909340
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6909340
• Substitutable numbers: 6909340, 64226909340
• Location on the vehicle: Rear
• Category: Other Interior Parts & Accessories

Purpose and function of the component

The air duct vent with ventilation grille in the BMW Z4 E85 is responsible for the controlled discharge of air from the vehicle interior to the outside, especially when closing doors, operating the blower, and during pressure changes in the cabin. Located in the rear of the body, it works with the factory air duct system, which allows for:

• stabilization of cabin pressure while driving,
• reduction of unwanted air turbulence and noise,
• efficient operation of the blower and air conditioning due to free airflow,
• preservation of factory sealing and acoustic characteristics of the body.

By maintaining the original geometry and design, this component allows for precise fitting to the rear body zone without the need for body modifications.

Benefits of using an original BMW component

Using an original air duct vent with ventilation grille in the BMW Z4 E85 translates into a number of practical operational benefits. The component has been designed specifically for this model, which means:

• factory fitment with mounting holes in the rear of the vehicle,
• preservation of the airflow direction intended by the manufacturer,
• compatibility with existing body seals and linings,
• reduction of the risk of unwanted resonances and rattles while driving.

Choosing an original component also ensures consistency with other ventilation system elements, which is important for long-term operation and maintaining acoustic comfort inside the roadster.

Mounting characteristics and application in the rear of the vehicle

The vent is intended for installation in the rear zone of the BMW Z4 E85, where it works with the body structure and the trunk lining or the rear part of the cabin (depending on the version). This location allows for:

• effective air discharge from the interior while maintaining body tightness,
• minimization of dirt and water ingress due to the integrated grille,
• maintenance of the air circulation direction intended by the manufacturer.

The component, as part of the Other BMW group, is particularly useful for post-collision repairs, replacing damaged body parts, or restoring full functionality of the ventilation system after removing the upholstery.

Product condition and application in service practice

The offered air duct vent with ventilation grille is a used component, which makes it an attractive cost-effective solution while maintaining the original manufacturer's specifications. This type of part is suitable in situations where:

• the existing vent has suffered mechanical damage or deformation,
• there are leaks in the rear of the body related to the ventilation system,
• after body and paint repairs, it is necessary to restore factory airflow.

Thanks to the original design, installation is predictable, and once installed, the component allows for restoring the proper operation of the ventilation system in the BMW Z4 E85.

System expansion and selection of related components

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 grilles, air ducts, or ventilation covers, check the available parts in the Other BMW category.

For users interested in comparing technical solutions used in sports models of other brands, including engines, brakes, and chassis, an article describing the differences between high-performance and standard versions may be helpful – you can find it here: Audi RS vs other models – what is hidden under the hood and chassis?.