Rear Wishbone Mercedes W164 W251 Right O/S Control Arm Strut A1643501606

Mercedes W164 W251 Rear Right Lower Control Arm Rear A1643501606 is an original part from the Control Arms and Ball Joints group, designed for installation on the rear right side of the suspension. It is a robust, factory-standard base for restoring proper rear axle geometry, driving stability, and predictable handling of your Mercedes vehicle.

Specifications and technical data

• SKU: A1643501606
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1643501606
• Substitutable numbers: A1643501606, A 164 350 16 06
• Location on the vehicle: Rear, Right
• Category: Control Arms, Ball Joints & Assemblies

Purpose and Function of the Control Arm

The presented control arm operates in the rear suspension on the right side, responsible for precise wheel guidance relative to the body. Its function is to maintain the correct position of the wheel hub, control camber and toe angles, and transfer loads generated during acceleration, braking, and traversing uneven surfaces.

A properly selected control arm limits unwanted play, reduces vibrations, and improves driving stability, which translates to better vehicle control, even tire wear, and more predictable cornering behavior.

Construction and Role in the Suspension System

The rear control arm in this application works in conjunction with other multi-link suspension components, forming a rigid yet kinematically flexible structure. Thanks to the appropriately selected geometry of the arm and mounting points, this component:

• stabilizes the wheel's position relative to the body in the longitudinal and lateral axes,
• enables controlled operation of bushings and ball joints throughout the full suspension travel,
• supports the maintenance of correct wheel alignment angles under various vehicle loads,
• limits the transfer of sudden impacts from the road surface to the body structure.

A component configured in this way is crucial for maintaining the cohesive operation of the entire system, especially in premium vehicles where high comfort and confident handling are expected.

Selection, Installation, and Benefits of Replacement

The control arm is designed for installation on the rear right side of W164 and W251 family vehicles, allowing for the preservation of factory handling characteristics. When selecting parts, it is advisable to pay attention to compatibility with the OEM number and any interchangeable numbers – this facilitates unambiguous identification and minimizes the risk of ordering errors.

Replacing a worn control arm with a functional part brings tangible benefits:

• reduction of knocks and play in the rear suspension,
• improved stability at higher speeds and during emergency maneuvers,
• more even tire wear on the rear axle,
• better transfer of braking and traction forces to the road surface.

After installation, it is recommended to perform a wheel alignment to fully utilize the potential of the newly installed control arm and ensure proper cooperation with other suspension components.

Part Condition and Practical Application

The offered control arm is a used part, allowing for an economical repair while maintaining the original construction. This solution is particularly beneficial for workshops specializing in Mercedes vehicle service and for owners who want to restore proper rear suspension function without compromising the factory specifications.

By preserving the original geometry and mounting points, installation in place of the worn component proceeds predictably, and the entire suspension system can once again operate according to the vehicle manufacturer's design.

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

Technical Support and Suspension Knowledge

To better understand the role of control arms in the drivetrain and the symptoms of their wear, it is worth consulting reliable technical materials. Practical tips for diagnosing and operating suspension components can be found in the article Suspension System – A Comprehensive Guide to Shock Absorbers, Control Arms, and Stabilizers, which discusses, among other things, the specific operation of control arms in premium cars.

If you want to make informed choices when selecting used parts and optimize the purchasing process in terms of OEM number compatibility and actual service needs, the guide Safe Online Purchase of Used Car Parts – A Step-by-Step Guide will be helpful, describing step-by-step how to verify used suspension components and other assemblies.