Mercedes R171 Rear Left N/S Suspension Wheel Carrier Flange Hub A2030505

Mercedes R171 Rear Left N/S Suspension Wheel Carrier Flange Hub is a component from the Steering Knuckles group, designed for the rear left axle of Mercedes vehicles. It enables stable wheel mounting, proper hub guidance, and the maintenance of correct suspension geometry, which translates into safe and predictable vehicle handling.

Specifications and technical data

• SKU: A2030505
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2030505
• Substitutable numbers: A2033503908, A 203 350 39 08, A2030505, A 203 05 05
• Location on the vehicle: Rear, Left
• Category: Steering Knuckles

Purpose and function in the chassis system

The rear left hub in Mercedes R171 family models is responsible for transferring loads from the wheel to the suspension and for maintaining the axial rotation of the wheel relative to the steering knuckle. A correctly selected component from this group minimizes play, reduces vibrations, and supports even tire wear, which is important for both driving comfort and the durability of other suspension components. Thanks to its precise fit for the specific vehicle location (rear, left side), the hub works in harmony with the factory suspension geometry, maintaining proper camber and toe angles. This is particularly important in Mercedes cars, where the chassis system is designed with great attention to stability at higher speeds.

Compatibility and identification by numbers

The offered hub belongs to the original Mercedes parts line, which facilitates its identification by OEM number and available interchangeable numbers. This numbering system design allows for selecting the correct component for a specific body and engine version without the need for modifications or installation adjustments. For users and workshops, this means the ability to quickly verify part compatibility with the vehicle, reducing the risk of errors and ensuring an efficient ordering process. In practice, this translates into shorter vehicle downtime at the service center and more predictable repair costs. If you want to deepen your knowledge on selecting components by OEM numbers and avoid unsuccessful purchases, it is worth using our practical guide: Buying parts online without risk – 5 proven ways to verify component compatibility.

Component characteristics and benefits of use

The rear left hub from the Steering Knuckles group in the Mercedes R171 operates under demanding conditions – it transfers dynamic loads, lateral forces in corners, and loads resulting from braking. Using a dedicated component with a design consistent with factory specifications:

• supports driving stability during changes in load and speed,
• reduces the risk of play developing in the wheel-suspension system,
• facilitates maintaining correct geometry after toe adjustment,
• ensures compatibility with standard braking and suspension system solutions. For the vehicle owner, this means predictable car behavior, better control over the vehicle, and the possibility of continued operation without the need to interfere with the suspension structure. A properly selected rear hub is also an important element during periodic inspections and post-accident repairs, where compliance with the manufacturer's technical documentation is required.

Condition, origin, and service application

The offered element is in used condition, which makes it an attractive cost alternative to new components while maintaining the original design specification. This type of solution is often chosen by workshops specializing in the Mercedes brand, especially for maintenance repairs and when restoring the chassis system after mechanical damage. The rear left hub will work well both for standard replacement of a worn element and for comprehensive rear axle suspension rebuilding. The original design from the Steering Knuckles group allows for maintaining factory mounting points and cooperation with other components, which simplifies the assembly process and limits the risk of problems during subsequent operation.

Expanding repairs within the rear axle

If you are planning a comprehensive repair or modernization of the rear suspension area in your Mercedes and need other elements from the same group, such as additional steering knuckles, mounts, or brackets, check out the available parts in the Mercedes Steering Knuckles category.