Mercedes Vito W639 Wheel Hub Rear Left N/S Suspension Leg Wheel Carrier Axle

The Mercedes Vito W639 Wheel Hub Knuckle Left Rear is a component from the Shock Absorber and Strut Mounts group, designed for the rear left axle of the vehicle. It ensures stable wheel hub mounting and proper suspension guidance, which translates to safe vehicle handling on the road. This solution is dedicated to users who expect precise fitment for the Mercedes Vito W639 construction and want to restore the correct geometry of the rear suspension.

Specifications and technical data

• SKU: A6393508705
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6393508705
• Substitutable numbers: A6393508705, A 639 350 87 05, BG
• Location on the vehicle: Rear, Left
• Category: Suspension Component Replacement Kits

Intended Use and Vehicle Placement

The wheel hub knuckle is designed for installation in the rear suspension area, on the left side. It is responsible for the rigid connection of suspension components to the wheel hub, enabling the correct operation of the shock absorber, strut, and other drivetrain components. Precise placement on the vehicle minimizes the risk of incorrect installation and facilitates the mechanic's work.

Function in the Suspension System

The component plays a key role in transferring loads between the wheel and the body, working in conjunction with the shock absorber and strut. A correctly selected left rear knuckle:

• stabilizes the position of the wheel hub relative to the control arms and the body,
• supports the maintenance of proper wheel geometry on the rear axle,
• influences even tire wear and predictable vehicle handling,
• ensures appropriate operating conditions for bearings and mounting elements.

Thanks to this, the suspension system operates as designed by the manufacturer, and the vehicle behaves predictably both under load and during daily operation.

Benefits of Using an Original Mercedes Part

Using a wheel hub knuckle dedicated to the Mercedes Vito W639 allows for the preservation of the rear suspension's original operating parameters. Correct mounting geometry minimizes the need for additional modifications, and the precise fit to the rear axle construction facilitates installation and subsequent wheel alignment. This is particularly important in commercial vehicles, where handling stability and predictable behavior under load directly impact safety and driving comfort.

Application in Repairs and Upgrades

The left rear wheel hub knuckle is suitable for both standard replacement of worn or damaged parts and for more extensive servicing of the rear suspension. It can be used, among other things, for:

• repairs after collisions in the rear axle area,
• damage resulting from operation on uneven surfaces,
• restoring correct wheel alignment after detecting excessive or uneven tire wear.

Choosing a component from the Shock Absorber and Strut Mounts group, matched to a specific vehicle model, reduces the risk of installation problems and maintains the integrity of the entire suspension system.

If you are planning a comprehensive repair or upgrade of the rear suspension area in your Mercedes and need other components from the same group, such as mounts, brackets, or struts, check the available parts in the Mercedes Shock Absorber and Strut Mounts category.

Condition and Selection of Used Parts

The presented wheel hub knuckle is a used part, allowing for an economical restoration of the rear suspension's functionality while maintaining proper fitment for the Mercedes Vito W639. When choosing such a component, it is worth paying attention to compatibility with the vehicle version and its placement on the vehicle to ensure correct cooperation with existing drivetrain elements.

For drivers interested in a broader perspective on selecting used components and optimizing operating costs, an article describing the practical aspects of using second-hand parts may be helpful – find more information in the material about used car parts and an economical approach to repairs.