Audi S3 8Y Rear Door Inner Gasket Rubber Seal Left Right N/O/S 8Y4833721C

Audi S3 8Y Rear Door Inner Gasket Rubber Seal Left Right N/O/S is a precisely fitted component from the Door seals category, designed for the rear left and right side of the vehicle body. Its original Audi origin ensures proper fitment to the bodywork, noise reduction, and stable door operation during daily use.

Specifications and technical data

• SKU: 8Y4833721C
• Mark: Audi
• Condition: Used
• OEM Part Number: 8Y4833721C
• Substitutable numbers: 8Y4833721C, 8Y4 833 721 C, 8Y4833721B
• Location on the vehicle: Rear, Right, Left
• Category: Door Seals

Purpose and vehicle placement

The presented inner gasket is dedicated to installation in the rear part of the vehicle, on both the left and right sides. This placement allows for:

• sealing the rear door perimeter from the interior side,
• limiting the ingress of moisture and contaminants,
• reducing wind noise at higher speeds,
• maintaining stable pressure of the door panel against the body.

Thanks to its fitment for the specific S3 8Y generation, the gasket maintains the correct geometry and works with factory mounting points.

Construction and material properties

The gasket is made of flexible rubber material, which provides adequate elasticity and resistance to typical operational loads. The design has been engineered to:

• maintain a seal during repeated door opening and closing,
• compensate for minor deformations of the bodywork and door frame,
• retain a stable shape in varying temperatures.

A properly formed cross-section profile supports correct water drainage from the door area and reduces the occurrence of unwanted vibrations and rattles while driving.

Benefits of using an original Audi gasket

Using an original inner gasket in an Audi S3 8Y translates into a number of practical benefits:

• Factory fitment – geometry consistent with the manufacturer's design minimizes the risk of leaks and the need for additional adjustments.
• Compatibility with other body components – the gasket works seamlessly with factory trim, upholstery, and door locks.
• Stable acoustic parameters – reducing outside noise improves the acoustic comfort of the cabin.
• Interior protection – reduced risk of moisture ingress into the sills and lower parts of the upholstery.

Characteristics of the used product

This item comes from the used parts segment, meaning it was previously installed in a vehicle. This type of component is a good solution for post-accident repairs, replacing damaged gaskets after upholstery removal, or eliminating leaks caused by operational wear. Choosing an original, used gasket allows you to maintain compliance with factory specifications while optimizing service costs.

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 additional perimeter seals, inner rubber sections, or sill sealing elements, check the available parts in the Audi door seals category.

For drivers interested in further improving ergonomics and driving feel, especially in sports models, information on the possibilities of replacing control elements may also be useful. You can find more on this topic in the article Personalization and ergonomics – when is it worth replacing the steering wheel with a premium model?, which discusses the practical aspects of selecting sports and premium steering wheels.