Audi R8 42 Control Arm Mount Bracket Upper Holder Rear Right O/S 420407458B

Audi R8 42 Upper Control Arm Mount Bracket Right Rear is an original part from the Control Arms & Ball Joints group, designed for the rear right suspension of the Audi sports model. The precise geometry of the bracket ensures stable mounting of the control arm, which translates into predictable handling and safe vehicle behavior at higher speeds.

Specifications and technical data

• SKU: 420407458B
• Mark: Audi
• Condition: Used
• OEM Part Number: 420407458B
• Substitutable numbers: 420407458B, 420 407 458 B
• Location on the vehicle: Rear, Right
• Gearbox type: No information
• Part type: Control Arm Kit
• Rim width: 8
• Category: Control Arms, Ball Joints & Assemblies

Purpose and Function in Audi R8 Suspension

The upper control arm mounting bracket for the right side of the rear axle is responsible for a rigid yet appropriately flexible connection between the control arm and the vehicle's structure. A correctly selected part in this location:

• maintains the correct geometry of the rear axle wheels,
• limits undesirable control arm displacement under load,
• supports even tire wear and driving line stability,
• influences the effectiveness of shock absorbers and other suspension components.

Thanks to its adaptation to the Audi R8's design, the bracket works with a suspension system engineered for dynamic driving, preserving the model's characteristic handling precision.

Compatibility and Mounting Parameters

The part is intended for installation in the rear right part of the vehicle, in the upper control arm mounting area. The bracket's design has been developed for compatibility with wheels of a specific width, which helps maintain appropriate loads on the suspension mounting points.

The bracket is part of the original Audi suspension system, meaning it retains factory mounting points, appropriate dimensional tolerances, and compatibility with standard control arms and other rear axle components. This solution is particularly important in high-performance vehicles, where even minor mounting deviations can affect handling.

Performance Characteristics and Benefits of Use

Choosing an original upper control arm bracket for the Audi R8 allows for maintaining the integrity of the entire suspension system. Key benefits include:

• stable rear axle handling during acceleration, braking, and lateral load changes,
• better maintenance of wheel alignment and camber angles,
• reduction of undesirable play in the control arm mounting,
• preservation of suspension performance characteristics in line with the manufacturer's specifications.

A part from this group is particularly important in cars subjected to dynamic driving, on roads with poorer surface quality, or occasionally on the track. The proper condition of the bracket translates into more confident handling and more predictable vehicle responses.

Condition, Origin, and Service Application

The offered bracket comes from the original Audi production line, which helps maintain material and structural consistency with other suspension components. As a used part, it is a good solution for post-accident repairs, replacement of worn mountings, or restoring factory suspension geometry after intensive use.

In workshop practice, the upper control arm bracket is most commonly used during:

• repairs after mechanical damage to the rear axle,
• comprehensive suspension refurbishment,
• resolving wheel geometry issues that cannot be corrected by adjustment alone.

Technical Support and Additional Information

To correctly select the bracket for a specific Audi R8 configuration, it is advisable to verify the part numbers and its location on the vehicle based on manufacturer data or service documentation. If in doubt, comparing the shape and mounting points with the part removed from the car can be helpful.

If you are planning a comprehensive repair or upgrade of the rear suspension area in your Audi and need other parts from the same group, such as additional brackets, mountings, or complete control arms, check the available parts in the Audi Control Arms & Ball Joints category.

For a better understanding of the role of such components in the entire drivetrain, it is worth reading the technical guide Suspension System – A Comprehensive Guide to Shock Absorbers, Control Arms, and Stabilizers, which discusses the relationships between individual suspension elements and their impact on driving safety.