Audi S4 B8 Rear Bumper Upper Top Guide Rail Mount Bracket Right O/S 8K9807890B

Audi S4 B8 Rear Bumper Upper Top Guide Rail Mount Bracket Right O/S is a precision body component designed for the stable mounting of the rear bumper on the right side. This component from the Brackets, mounts and assembly parts group ensures proper guidance and support for the bumper, which translates into correct panel alignment and an aesthetic appearance of the vehicle's rear section. Using an original pre-owned part allows you to maintain the factory mounting geometry without the need for compromise solutions.

Specifications and technical data

• SKU: 8K9807890B
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K9807890B
• Substitutable numbers: 8K9807890B, 8K9 807 890 B
• Location on the vehicle: Rear, Right
• Category: Mounts, Brackets & Hardware

Purpose and function of the guide rail mount

The offered guide rail mount is designed as an assembly component for the rear bumper on the right side of the Audi S4 B8 generation model. Its task is to guide and support the edge of the bumper in such a way as to:

• maintain the correct contact line with body elements,
• minimize play and unwanted vibrations,
• facilitate the removal and reinstallation of the bumper during body and paint repairs,
• ensure repeatable, stable mounting in accordance with the manufacturer's specifications.

Thanks to its appropriately shaped geometry, the mount works with the bumper tabs, allowing for smooth insertion and locking into the intended position.

Benefits of using an original Audi mount

Using an original guide rail mount in an Audi S4 B8 brings a number of practical benefits in daily use and during body repairs:

• Factory fit – the element was designed specifically for this model, which reduces the risk of assembly problems and unnatural gaps between the bumper and the bodywork.
• Stable bumper mounting – a properly selected mount helps keep the bumper aligned, which is important both for appearance and for the operation of sensors or other components mounted in the bumper (if present in the vehicle's configuration).
• Assembly repeatability – during subsequent bumper removals (e.g., for repairs or service), the mount retains its guiding properties, facilitating work for the workshop.
• Structural consistency – using an element from the same assembly group as other body components allows for maintaining the manufacturer's original design concept.

Assembly characteristics and application

The bumper guide rail mount is intended for installation in the rear, right part of the body. As an element from the Brackets, mounts and assembly parts category, it works with other bumper mounting points, creating a complete support and guidance system. In practice, this means that it:

• acts as a side guide for the bumper in the rear zone,
• transfers part of the loads resulting from the bumper's movement while driving,
• helps maintain even gaps between the bumper, the fender, and the trunk lid,
• is an essential element when restoring the factory look after a collision or bumper replacement.

By maintaining the original design, the mount allows for precise reproduction of the body lines, which is particularly important in premium class cars such as the Audi S4.

Condition of the element and use in repairs

The offered mount is a pre-owned element, which in the case of body assembly parts often represents a reasonable compromise between cost and functionality. This type of component, while maintaining proper geometry and mounting points, can be successfully used in:

• post-accident repairs of the vehicle's rear section,
• replacing damaged mounts after bumper removal,
• restoring correct bumper alignment after previous, improper repairs.

Choosing an original pre-owned mount allows you to reduce costs while maintaining compliance with the vehicle's factory design.

If you are planning a comprehensive repair or upgrade of the rear body zone in your Audi and need other elements from the same group, such as additional brackets, mounts, or assembly supports, check the available parts in the Audi Brackets, mounts and assembly parts category.

Technical support and selection of pre-owned parts

When selecting pre-owned assembly elements, it is worth being guided not only by price but also by the origin and compatibility with the specific engine or body version of a given model. For users interested in a broader context of using pre-owned parts in premium class cars, an article describing the specifics of repairs using original components may be helpful. More on the cost-effectiveness of using pre-owned parts in German vehicle brands can be found in the material: BMW N47 timing chain – typical failure and repair using original BMW parts.