Audi R8 42 Control Arm Mount Bracket Lower Holder Rear Right O/S 420407458H

Audi R8 42 Lower Control Arm Mount Rear Right is a precision component from the Control Arms and Ball Joints group, designed for the rear right suspension. As an original Audi component, it ensures proper wheel guidance, body stability, and predictable vehicle behavior during dynamic driving. This is a solution for users who expect robust suspension geometry and correct load transfer in the sporty R8 design.

Specifications and technical data

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

Purpose and Function in Suspension

The lower control arm mount in the rear right part of the vehicle is responsible for the stable connection of suspension elements to the body and for maintaining the correct wheel position relative to the vehicle's axis. In the case of the Audi R8's construction, this is particularly important for:

• maintaining correct wheel geometry under high lateral loads,
• precise car handling in corners,
• even transfer of forces from the control arm to the body structure.

A properly selected lower control arm mount reduces unwanted play and deformation, which translates to predictable suspension reactions and better vehicle control during acceleration and braking.

Compatibility and Mounting Parameters

The presented element has been developed specifically for the suspension architecture of the Audi R8 series 42, taking into account the characteristics of the rear axle and the weight distribution of this model. The mount works with the control arm and other rear suspension components, providing appropriate mounting points and connection rigidity.

An important aspect is the adaptation to wheel configurations with specific rim widths, which affects the distribution of forces acting on the mount and control arm. This allows for maintaining consistency between suspension geometry and tire parameters, contributing to driving stability and predictable vehicle behavior.

Performance Characteristics and Application Benefits

The lower control arm mount in this version allows for maintaining the factory performance characteristics of the Audi R8 suspension. Appropriate structural rigidity supports:

• precise maintenance of wheel alignment and camber within the manufacturer's specified range,
• reduction of unwanted movements during sudden load changes,
• stable vehicle handling at higher speeds.

For the user, this means more confident vehicle behavior, better predictability of reactions to steering inputs, and more effective use of tire grip. Replacing a worn or damaged mount with a functional component from the same construction group helps restore correct suspension performance without altering the manufacturer's design.

Component Condition and Service Application

The offered lower control arm mount is a used part, making it an attractive service solution for Audi R8 owners seeking a compromise between repair cost and maintaining the original suspension design. This type of component is suitable for both standard replacement of worn parts and for rebuilding the rear axle after mechanical damage.

Due to the specific nature of rear suspension operation in sports cars, using the correct lower control arm mount is crucial for safety and for maintaining the manufacturer-intended driving characteristics. In conjunction with properly selected control arms, ball joints, and other system components, this part allows for consistent, stable, and predictable vehicle behavior.

Expanding Knowledge and Selecting Other Components

To better understand the role of mounts, control arms, and ball joints in the entire drivetrain, it is worth referring to expert material describing the relationships between individual suspension components, their impact on safety, and signs of wear – this is thoroughly discussed in the article "Suspension System – A Comprehensive Guide to Shock Absorbers, Control Arms, and Stabilizers", which helps in consciously planning repairs and diagnostics.

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