Audi A4 S4 B9 Strut Brace Front Left N/S Bar Support Reinforcement 8W0805645B

The Audi A4 S4 B9 Front Left Strut Brace is a structural component from the category of longitudinal body frame parts and brackets, designed for the front left section of the vehicle body. It is responsible for the stable connection of suspension elements to the vehicle's structure, which translates into precise handling and predictable vehicle behavior.

Specifications and technical data

• SKU: 8W0805645B
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W0805645B
• Substitutable numbers: 8W0805645B, 8W0 805 645 B
• Location on the vehicle: Front, Left
• Category: Frame Rails & Subframes

Purpose and Function in the Body

The front left strut brace operates in a critical area of the front body, where loads from the suspension strut are transferred to the frame structure. A properly selected bracket helps to:

• Stiffen the front body in the area of the suspension strut mounting.
• Maintain suspension geometry during braking, acceleration, and when encountering uneven surfaces.
• Reduce unwanted deformations in the strut mounting zone, contributing to driving stability.

Its placement on the front left side of the vehicle allows for precise fitting to the factory mounting points in the Audi body.

Construction and Fitment for Audi

This element belongs to the category of longitudinal body frame parts and brackets, meaning it is designed to transfer structural loads, not just serve as a protective cover. Thanks to its construction conforming to manufacturer standards:

• It fits factory mounting points in the front left section of the body.
• It works with the stock suspension and other subframe components.
• It ensures the retention of factory stiffness in the strut area, which is crucial for wheel alignment and camber adjustments.

This precise fitment minimizes the need for modifications and simplifies installation in workshop conditions.

Application in Used and Post-Accident Vehicles

For vehicles that have been involved in collisions or subjected to intensive use, components such as braces and brackets in the front body often require replacement. Using an original strut brace allows for:

• Restoring proper load distribution in the suspension mounting zone.
• Facilitating correct geometry alignment after body and mechanical repairs.
• Reducing the risk of secondary stresses in adjacent frame and longitudinal elements.

This is particularly important in vehicles where stable handling at higher speeds and consistent suspension behavior are expected.

Characteristics of a Used Part

This brace comes from the used parts segment, which practically means the possibility of an economical repair while maintaining a structure consistent with Audi's factory specifications. For workshops and end-users, this translates to:

• Lower cost while preserving the original geometry of the load-bearing element.
• Better fitment than many aftermarket universal replacements.
• The possibility of use in professional post-accident repairs where compliance with manufacturer documentation is paramount.

Prior to installation, a standard workshop inspection, typical for used structural body components, is recommended.

Technical Support and Parts Selection

When selecting suspension and body structural components, it is advisable to consider the differences between stock and sport solutions. If you want to better understand the impact of such components on vehicle handling, see the article: Stock vs. Sport Suspension – Construction Differences and Used Parts Selection.

If you are looking for other parts from the longitudinal body frame parts and brackets category dedicated to this brand, check the available Audi longitudinal body frame parts and brackets to select a complete structural solution for your vehicle.