Audi A4 S4 B8 Sill Trim Side Skirt Cover Strip Left N/S Black 420853905

Description

Audi A4 S4 B8 Sill Trim Side Skirt Cover Strip Left N/S Black is an original body component designed for installation on the driver’s side. It provides an aesthetic finish to the lower edge of the bodywork while acting as a practical shield for the sill against dirt and mechanical damage. This solution is particularly recommended when replacing a damaged trim or during post-accident repairs, where factory fitment and a consistent vehicle appearance are essential.

Specifications and technical data

• SKU: 420853905
• Mark: Audi
• Condition: Used
• OEM Part Number: 420853905
• Substitutable numbers: 420853905, 420 853 905
• Location on the vehicle: Left
• Category: Running Boards & Side Bars

Purpose and fitment for Audi A4 / S4 B8

The presented Audi A4 S4 B8 Sill Trim Side Skirt Cover Strip Left N/S Black has been designed specifically for the Audi A4 / S4 B8 generation body, taking into account the sill geometry and side lines characteristic of this model. The component is mounted on the left side of the vehicle, allowing for the precise restoration of the factory sill cover layout without the need for modifications.

Its original Audi origin ensures the maintenance of the correct profile, mounting points, and compatibility with factory clips and sill brackets. As a result, once installed, the trim creates a cohesive line with the remaining side body panels, without unnatural gaps or material stress.

Design and functional characteristics

The black sill trim serves both a visual and protective function. Its tasks include:

• protecting the lower part of the bodywork against stone chips, mud, and minor road impacts,
• providing a stable finish to the sill edge in the cabin entry area,
• maintaining proper aerodynamics of the side body section,
• preserving a consistent side line appearance in A4 and S4 B8 versions.

Thanks to its factory design, the trim works with the original mounting points on the body, which facilitates installation and reduces the risk of improper fitment. The black color blends well with both light and dark paint finishes, allowing for a neutral, factory-standard look for the car.

Condition, application, and benefits of installation

The item comes from disassembly and is offered as a used part, which is a cost-effective solution for body repairs when the priority is combining original quality with reasonable costs. Replacing a damaged or missing sill trim with an original component allows you to:

• restore the correct appearance of the side bodywork after a collision or corrosion,
• maintain compliance with Audi’s factory specifications,
• reduce the risk of mismatching typical of low-quality aftermarket replacements,
• maintain proper sill protection against external factors.

This solution is especially recommended for users who want to keep their car in a condition close to factory-original, without compromising on original design solutions.

Support with part selection and additional information

When selecting a sill trim for a specific Audi A4 / S4 B8 body version, it is crucial to verify compatibility with the manufacturer’s markings and the mounting side. In case of doubt, it is worth comparing the shape and mounting method with the component installed on the opposite side of the vehicle or consulting a service center specializing in the Audi brand.

If you are planning a comprehensive repair or upgrade of the sill area in your Audi and need other elements from the same group, such as covers, overlays, or additional trims, check the available parts in the Audi sill trims category.

For users interested in a broader context of selecting original components and the principles of identifying used parts by manufacturer markings, the following article describing the specifics of Audi power units and the selection of OEM parts may be helpful – you can find it here: Audi five-cylinder engine – a legend from Quattro to RS3 and how to take care of it using original Audi parts.