Audi A6 C7 Rear Door Gasket Rubber Seal Sealing Lower Left N/S 4G0839717A

Audi A6 C7 Rear Door Gasket Rubber Seal Sealing Lower Left N/S is an original body component from the Window seals and moldings group, designed for installation in the rear left door. It ensures a tight closure of the door panel, limits the ingress of water and contaminants, and stabilizes the lower edge of the door skin, which positively affects acoustic comfort and body durability.

Specifications and technical data

• SKU: 4G0839717A
• Mark: Audi
• Condition: Used
• OEM Part Number: 4G0839717A
• Substitutable numbers: 4G0839717A, 4G0 839 717 A
• Location on the vehicle: Rear, Left
• Category: Window Seals, Gaskets & Trims

Purpose and technical function

The rear left lower door seal in the Audi A6 C7 operates in the critical contact area between the door, the sill, and the wheel arch. Its purpose is to:

• limit the ingress of water, mud, and road salt into the door interior and cabin,
• stabilize the lower edge of the door relative to the body,
• reduce road noise and wind noise,
• protect paint and sheet metal components from accelerated corrosion.

Thanks to its specific profile and fitment for the particular body model, the seal works in conjunction with other door assembly components to create a cohesive, airtight system.

Original origin and fitment

The component comes from the Audi brand, which ensures the preservation of factory geometry, the correct hardness of the rubber compound, and compatibility with the mounting points on the rear left door. The original design translates into:

• a secure fit to the shape of the door and sill,
• proper adhesion along the entire length of the edge,
• no need for modifications or forced adjustments.

Such a solution is particularly beneficial for post-accident repairs, replacing corroded components, or restoring body tightness after years of operation.

Performance characteristics and installation

The Audi A6 C7 rear left lower door seal has been designed for installation in factory mounting points. In practice, this means:

• the ability to install it in place of a worn or damaged seal without interfering with the door structure,
• maintaining the original line of contact with the sill and wheel arch,
• easier adjustment of the door relative to the body in terms of gaps and tightness.

Precise fitment helps reduce rattles, vibrations, and leaks that often appear when using aftermarket parts with a universal profile.

Use in service and body restoration

Replacing the rear left lower door seal is recommended, among other things, in the case of:

• visible cracks, abrasions, or deformations of the rubber,
• the appearance of water leaks in the area of the sill and the rear part of the cabin,
• restoration of the sill and wheel arch area after body and paint repairs.

Choosing an original seal allows you to maintain the structural integrity of the body and preserve factory standards of tightness and driving comfort.

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 lower moldings, frame seals, or additional protective profiles, check the available parts in the Audi window seals and moldings category.

Why choose a used OEM component

A used, original door seal for the Audi A6 C7 is a solution that combines controlled costs with the preservation of factory-quality fitment. In many cases, the condition of such a component allows for further, trouble-free operation, especially when the priority is to restore tightness after a local body repair, rather than a full reconstruction of the entire set of seals.

If you are considering a wider use of components from the secondary market and want to take a conscious approach to choosing used parts, it is worth familiarizing yourself with practical tips – the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors? will be helpful, as it discusses the approach to used parts in modern cars.