Mercedes W168 Rear Left N/S Suspension Leg Radius Arm Wheel Hub

Mercedes W168 Rear Left N/S Suspension Leg Radius Arm Wheel Hub is a precision suspension component designed for installation on the rear left axle of the vehicle. As part of the Suspension repair kits group, it ensures stable wheel guidance, correct suspension geometry, and safe interaction with other components. This used part allows for an economical yet technically sound repair of the rear suspension in BMW vehicles.

Specifications and technical data

• SKU: A1683503306
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: A1683503306
• Substitutable numbers: A1683503306, A 168 350 33 06, A1683500435, A 168 350 04 35, A1684230401, A 168 423 04 01
• Location on the vehicle: Rear, Left
• Category: Suspension Component Replacement Kits

Purpose and function in the suspension system

The rear left steering knuckle with wheel hub is responsible for a rigid yet controlled connection between the wheel, the suspension, and the vehicle body. This component handles vertical and lateral loads, works in conjunction with control arms, springs, shock absorbers, and the braking system, and maintains the correct position of the hub relative to the body. As a result, the wheel maintains stable contact with the road surface, which translates into predictable vehicle handling and even tire wear.

Key technical advantages

The steering knuckle integrated with the hub for the rear left side of the vehicle has been designed to ensure:

• proper wheel guidance in the vertical and horizontal axis,
• stable mounting of suspension and brake components,
• maintenance of the specified rear axle geometry,
• correct interaction with the wheel bearing and sensors (if present in the given model).

Consequently, replacing a worn or damaged steering knuckle with a functional part from the same design group allows for the restoration of proper vehicle behavior during acceleration, braking, and cornering. This is particularly important in BMW vehicles, where handling precision is a key element of the driving characteristics.

Used condition – a conscious, economical choice

The presented Mercedes W168 Rear Left N/S Suspension Leg Radius Arm Wheel Hub is offered as a used part, which allows for a significant reduction in repair costs compared to new replacements. At the same time, you retain the original suspension performance characteristics resulting from the factory design of the component. This solution is particularly beneficial during comprehensive work on the rear axle, where several components are often replaced simultaneously.

If you are also considering the use of used sub-assemblies in other key vehicle systems, it is worth familiarizing yourself with practical tips regarding the selection of original parts. This is discussed in more detail in the article: Manual transmission failures – why an original used part is a more sensible choice than remanufacturing, which shows how to consciously choose used components instead of costly remanufacturing.

Selection and compatibility within Suspension repair kits

The rear left steering knuckle with hub is part of a broader group of elements responsible for the operation of the rear suspension. When planning a repair, it is worth paying attention to the consistency of the entire system – the condition of control arms, bushings, shock absorbers, or springs has a direct impact on the durability and efficiency of the replaced steering knuckle. A correctly selected set of components minimizes the risk of repeated interventions in a short time and helps maintain stable geometry parameters.

If you are planning a comprehensive repair or upgrade of the rear axle suspension zone in your BMW and need other elements from the same group, such as additional steering knuckles, hubs, or related mounting components, check the available parts in the BMW Suspension repair kits category.

Summary of application

Mercedes W168 Rear Left N/S Suspension Leg Radius Arm Wheel Hub is a functional, used component designed for installation on the rear left side of the vehicle, allowing for the restoration of proper suspension operation and handling stability. By choosing an original component from the Suspension repair kits group, you gain structural consistency with other sub-assemblies and the possibility of an economical, technically sound repair of the suspension system in a BMW vehicle.