Audi A4 B8 Rear Door Seal Left Right N/O/S Inner Protection Gasket 8K5833721F

Audi A4 B8 Rear Door Seal Left Right N/O/S Inner Protection Gasket is an original component from the Doors and door panels group, designed to protect the edges of the rear doors on both the left and right sides. It ensures a tight seal, reduces moisture ingress, and improves acoustic comfort inside the vehicle.

Specifications and technical data

• SKU: 8K5833721F
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K5833721F
• Substitutable numbers: 8K5833721F, 8K5 833 721 F
• Location on the vehicle: Rear, Right, Left
• Category: Doors & Door Skins

Purpose and function of the protective seal

The seal has been specifically designed for Audi models as a component mounted on the rear doors on both the left and right sides. Its task is to create a flexible barrier between the door and the body, which helps reduce wind noise, minimize the ingress of dirt, and support corrosion protection in the critical door edge area.

Thanks to its factory profile, the seal fits the shape of the door well, which facilitates installation and allows for consistency with other body components. This is a practical solution for post-accident repairs, replacing corroded parts, or restoring sealing after door disassembly.

Construction and body fitment

The component belongs to the Doors and door panels group, so its geometry is adapted to the factory outline of the rear body section. The properly profiled working edge works with the lock and hinges so that the seal is evenly compressed along its entire length when the door is closed.

This solution allows for:

• maintaining a stable door position relative to the body,
• reducing vibrations and rattling resulting from clearances on the perimeter,
• maintaining an aesthetic contact line between the door, fender, and pillar.

Vehicle placement and service application

The seal is intended for installation on the rear door on the right or left side, which allows it to be used both for one-sided repairs and for comprehensive replacement of seals in the rear part of the body. This solution is particularly useful for:

• repairs after collisions involving the rear side of the vehicle,
• replacing doors with parts from disassembly,
• eliminating leaks and noise in the rear door area.

The product in used condition allows for economical repair while maintaining the characteristics of original Audi equipment, which is important for maintaining the structural and visual consistency of the vehicle.

Benefits of using an original Audi seal

Using an original rear door protective seal brings a number of practical benefits. First and foremost, it ensures a factory fit to the door edge, which translates into stable adhesion and predictable behavior during operation. Additionally, it helps reduce the ingress of water and contaminants into the interior and the space between the door and the body, which promotes a longer service life for sheet metal components.

If you are considering a choice between refurbishment and installing a used component, it is worth checking out practical tips – more information can be found in the article Refurbished or used original – which part to choose for repair?.

Expanding repairs within the Audi door area

If you are planning a comprehensive repair or upgrade of the door zone in your Audi and need other components from the same group, such as panels, reinforcements, or additional mounting elements, check out the available parts in the Audi Doors and door panels category.