Audi A4 B9 Rear Door Seal Gasket Rubber Inner Weatherstrip Right O/S 8W0839480

Audi A4 B9 Rear Door Seal Gasket Rubber Inner Weatherstrip Right O/S is a precisely fitted component from the Door seals group, designed specifically for the rear right window in the Audi body. The original design ensures proper window guidance, limits the ingress of contaminants into the door interior, and supports the correct operation of the window lifting mechanism.

Specifications and technical data

• SKU: 8W0839480
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W0839480
• Substitutable numbers: 8W0839480, 8W0 839 480
• Location on the vehicle: Rear, Right
• Category: Door Seals

Purpose and technical function

The inner weatherstrip is responsible for the controlled drainage of water from the window surface and for its stable guidance in the channels. In the rear right area of the Audi A4 B9 body, this component:

• limits the ingress of moisture and dirt into the door interior,
• supports smooth movement of the window up and down,
• reduces unwanted vibrations and noise while driving,
• protects the window regulator mechanism from accelerated wear.

Thanks to the factory profile and correct geometry, the seal works with the window and the door panel as intended by the manufacturer, which translates into stable operation of the entire door assembly.

Compatibility with Audi A4 B9

The presented Audi A4 B9 Rear Door Seal Gasket Rubber Inner Weatherstrip Right O/S has been developed for the specific Audi A4 B9 generation, which allows for maintaining factory assembly clearances and proper pressure against the glass. The placement on the vehicle is limited to the rear right side, which is why the component is intended for use exactly at this point of the bodywork.

Such a fit minimizes the risk of leaks, improper adhesion to the glass, or the need for modifications during installation. In practice, this means an efficient replacement and a quick return to the proper operation of the window in the rear right door.

Performance characteristics of the used component

The seal comes from dismantling, which in practice means that it is a component with preserved geometry and performance parameters, but with natural signs of use. For many Audi users, this is a reasonable compromise between cost and maintaining the original build quality characteristic of the Audi brand.

Using an original used seal allows for maintaining material consistency with other door components, while simultaneously reducing the risk of problems typical of replacements with poorer profile fitment.

Benefits of using an original weatherstrip

Replacing a worn or damaged weatherstrip in the rear right door of an Audi A4 B9 brings measurable operational effects:

• smoother window operation and less load on the regulator mechanism,
• reduction of window fogging from the inside thanks to better moisture control,
• reduced risk of corrosion inside the door by reducing standing water,
• improvement of acoustic comfort inside the vehicle.

For users who care about the condition of the bodywork and window mechanisms, this is an important preventive element that helps maintain the proper technical condition of the door for a longer time.

Expansion of service work scope

If you are planning a comprehensive repair or upgrade of the door area in your Audi and need other elements from the same group, such as additional seals, weatherstrips, or inner window frame seals, check the available parts in the Audi door seals category.

For those interested in a broader approach to maintaining the car in good technical condition, expert materials regarding the operation of power units and accessories may also be helpful – for example, an article on how properly performed regeneration of key components affects engine performance: The second life of the Mercedes OM642 engine – how injectors and a turbocharger restore the power of the 3.0 V6 CDI.