Audi A4 B8 S4 Door Seal Rear Right O/S Protection Gasket 8K5839440G

Visual condition of the part

The product shows signs of use visible in the photos.

Audi A4 B8 S4 Door Seal Rear Right O/S Protection Gasket is an original component from the Door seals group, designed for installation in the rear right section of the vehicle body. It ensures a tight door closure, reduces road noise, and improves interior insulation against water and contaminants. This is a precision-fitted part that allows you to restore the factory acoustic and functional comfort parameters in your Audi.

Specifications and technical data

• SKU: 8K5839440G
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K5839440G
• Substitutable numbers: 8K5839440G, 8K5 839 440 G
• Location on the vehicle: Rear, Right
• Part type: Door Seal
• Category: Door Seals

Purpose and function of the door seal

The presented seal is dedicated to installation in the rear right part of the body, within the passenger door area. Its purpose is to:

• seal the contact point between the door and the body in the rear part of the vehicle,
• limit the ingress of water, mud, and dust into the interior,
• reduce wind noise and external noise while driving,
• stabilize the door position relative to the body frame.

Thanks to its proper profile and fitment for the specific model, the seal works with the factory hinges and lock, which translates into secure door closing and predictable body behavior during daily use.

Benefits of using an original Audi seal

Using an original seal in the Audi A4 B8 / S4 allows you to maintain the structural integrity of the body and avoid problems typical of aftermarket replacements. Key advantages include:

• Factory geometric fitment – the seal profile matches the shape of the door and frame, which minimizes the risk of leaks.
• Stable door guidance – the appropriate stiffness and flexibility of the material support the correct positioning of the door panel.
• Better acoustic insulation – reduction of noise penetration from the wheel arch and the rear part of the body.
• Interior protection – reduced risk of moisture affecting the upholstery, door sills, and electrical components in the door area.

For users who care about the technical and visual condition of their vehicle, replacing a worn seal with an original part is a simple way to restore driving comfort and improve the perceived quality of door closing.

Installation characteristics of the rear right seal

The seal is designed for installation in the rear right part of the vehicle, which is important both when selecting parts and when planning service work. In practice, this means:

• dedicated shaping for the contour of the rear passenger door,
• adaptation to factory mounting points in the Audi body,
• possibility of installation within standard service procedures without the need for body modifications.

Such a solution facilitates workshop work and shortens replacement time, while simultaneously allowing for consistency with the original body structure.

Part condition and service application

The offered door seal comes from the used parts segment, which makes it an attractive cost alternative while maintaining original origin. This is a particularly beneficial solution for:

• post-accident repairs of the rear body section,
• removing the effects of operational wear in the door area,
• restoring tightness after replacing or adjusting the rear doors.

For workshops specializing in the Audi brand and users who maintain their vehicles themselves, such a configuration allows for cost-effective restoration of factory parameters without sacrificing the original specification.

Complementary Audi door seals

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 front door seals, sill seals, or additional sealing profiles, check the available parts in the Audi door seals category.

For those interested in a broader approach to upgrading performance and components in sports cars and comparing OEM solutions, an article describing the selection and installation of used turbochargers in the Mini Cooper S may be helpful – you can find it here: Go-Kart Feeling XXL: used N18 turbocharger versus B48 – what to choose for a Mini Cooper S?.