Audi A4 B7 Rear Door Inner Gasket Rubber Seal Left Right N/O/S 8E9833721F

Audi A4 B7 Rear Door Inner Gasket Rubber Seal Left Right is an original component from the Door seals group, designed for installation on the rear axle of the vehicle on either the left or right side. It ensures a tight door closure, reduces noise, and supports the proper operation of the lock and windows, improving acoustic comfort and protecting the interior from moisture.

Specifications and technical data

• SKU: 8E9833721F
• Mark: Audi
• Condition: Used
• OEM Part Number: 8E9833721F
• Substitutable numbers: 8E9833721F, 8E9 833 721 F
• Location on the vehicle: Rear, Right, Left
• Category: Door Seals

Purpose and vehicle placement

The presented seal has been designed specifically for the rear body section of the Audi A4 B7 generation. The component is mounted on the inner perimeter of the rear doors, on both the driver and passenger sides, which allows for maintaining structural and visual consistency of both rear doors.

Thanks to its precise fit to the shape of the door opening, the seal stabilizes the door leaf during closing, reduces vibration transmission, and minimizes the risk of leaks at critical contact points between the metal and upholstery elements.

Sealing function and interior protection

The inner door seal plays a key role in protecting the cabin from external factors. It is responsible for:

• reducing the ingress of water and moisture into the door interior and cabin,
• limiting road noise and wind noise at higher speeds,
• stabilizing the operation of window and lock mechanisms by reducing door structure vibrations,
• maintaining proper door pressure against the body, which affects the quality of the closing action.

A properly selected and functional seal helps maintain acoustic comfort and supports long-term protection of upholstery and metal elements against corrosion resulting from dampness.

Characteristics of the original Audi component

As a part intended for Audi, the rear door inner seal has been manufactured in accordance with the manufacturer's factory standards. This means maintaining the appropriate hardness and flexibility of the material, which translates into proper pressure against the door frame and durability under typical operating conditions.

Original fitment eliminates the need for modifications, trimming, or additional sealing. The element works with factory clips and guides, which facilitates installation and subsequent potential adjustment of the door position relative to the body.

Condition of the component and service application

The seal is offered as a used part, which allows for an economical replacement of a worn or damaged element while maintaining the original Audi specification. This type of component is particularly useful in situations where:

• the existing seal is perished, cracked, or locally torn,
• there are noticeable drafts at the door edges,
• moisture appears on the sills or in the lower part of the upholstery after rainfall,
• it is necessary to restore the factory door fitment after bodywork repairs.

Using an original seal helps restore the proper performance parameters of the rear doors without interfering with the body structure.

Support with selection and additional materials

Proper selection of the seal for the specific Audi A4 B7 body version is crucial for maintaining tightness and driving comfort. If necessary, it is worth verifying the compatibility of the part with the manufacturer's markings and its placement on the vehicle to avoid installation problems and leaks in the future.

If you are planning a comprehensive repair or modernization of the door area in your Audi and need other elements from the same group, such as additional perimeter seals, sealing strips, or soundproofing elements, check the available parts in the Audi door seals category.

For a better understanding of the principles of selecting components by manufacturer numbers and the impact of body tightness on vehicle operation, an article describing diagnostics and part selection by factory markings may be helpful – you can find it here: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.