Mercedes W166 350 BlueTec Rear Left N/S Suspension Leg Brake Disc Wheel Hub

Mercedes W166 350 BlueTec Rear Left N/S Suspension Leg Brake Disc Wheel Hub is a complete rear suspension component designed for the left-hand drive axle of W166 series models. This factory suspension assembly ensures precise wheel guidance, body stability, and correct geometry, which translates into safe handling and predictable vehicle behavior. Thanks to its original design, it is a solution compatible with factory traction control and electronic stability program systems.

Specifications and technical data

• SKU: A1663500108-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1663500108
• Substitutable numbers: A1663500108, A 166 350 01 08, A1663501110, A 166 350 11 10, A1664230581, A 166 423 05 81, A1664230600, A 166 423 06 00
• Location on the vehicle: Rear, Left
• Category: Suspension Component Replacement Kits

Purpose and function in the suspension system

The described rear suspension set is responsible for a rigid yet flexible connection between the wheel and the body on the rear left side. Integrating the suspension leg, steering knuckle, and wheel hub into a single assembly allows for maintaining proper camber and toe angles, as well as transferring vertical and lateral loads during driving, braking, and acceleration. This component works in conjunction with control arms, the shock absorber, and the braking system to create a cohesive, stable running gear.

Assembly structure and key technical features

Combining the suspension leg, steering knuckle, and wheel hub into one module reduces the number of mechanical connections, which helps maintain the rigidity of the entire structure. The rear left placement on the vehicle means the component has been designed for specific axle geometry, taking into account the drive characteristics, vehicle weight, and the distribution of forces acting on the suspension. As a result, the suspension system operates according to the manufacturer's specifications, and the wheel maintains stable contact with the road surface.

The original design solution used by Mercedes ensures adequate rigidity in both horizontal and vertical planes, while simultaneously dampening vibrations transmitted from the road. Using a factory module minimizes the risk of improper fitment with other suspension components and eliminates the need for mounting modifications.

Vehicle placement and compatibility

The element is intended for installation on the rear axle on the left side, which is crucial for maintaining correct geometry and compatibility with safety systems. Proper placement on the vehicle facilitates part selection during post-collision repairs, replacement after mechanical damage, or during comprehensive suspension restoration. Using an original assembly allows for maintaining factory running gear performance parameters without the need for adaptation or interference with the body structure.

Condition, application, and benefits of installation

The product comes from the Suspension replacement kits group, meaning it is prepared as a complete module for installation in place of the factory assembly. The used nature of the part allows for economical repair while maintaining original technical specifications, which is particularly important for advanced premium-class models. Installing such a component is beneficial for:

• post-accident rear axle repairs,
• mechanical damage to the steering knuckle or wheel hub,
• excessive play within the wheel mounting area,
• restoring factory suspension geometry.

By using an original module, you can reduce the risk of improper wheel alignment, accelerated tire wear, and unwanted body vibrations. This solution is especially recommended for servicing vehicles used daily, where predictable car behavior and handling stability are essential.

Support with selection and expanding knowledge

If you are planning a comprehensive repair or upgrade of the suspension area in your Mercedes and need other elements from the same group, such as control arms, hubs, or steering knuckles, check the available parts in the Mercedes suspension replacement kits category.

When choosing between new and used suspension components, it is worth considering both costs as well as the durability and availability of original components. You can read more about the differences between new and used parts, as well as how to consciously approach the purchase of car components, in the article Car parts – new or used? Comparing costs, quality, and durability.

Additionally, if you are interested in the cost-effectiveness of using original used components compared to regeneration, it is worth familiarizing yourself with the analysis presented in the blog post Manual transmission failures in cars – why is an original used part a more sensible choice than regeneration?, which shows the broader economic and technical context of such service decisions.