Mercedes W221 Roue Arrière Gauche Suspension Roue Moyeu A2213502108

Mercedes W221 Knuckle Left Rear A2213502108 is an original suspension component designed for the rear left axle of the vehicle. The knuckle is responsible for precise wheel guidance, driving stability, and proper cooperation between the suspension and the braking system, making its correct selection crucial for safety. This component from the Suspension Replacement Kits category provides a solid foundation for professional repair of the rear suspension in Mercedes premium models.

Spécifications et données techniques

• UGS: A2213502108-1
• Marque: d'origine Mercedes
• Condition: D'occasion
• Numéro de pièce OEM: A2213502108
• Nombres substituables: A2213502108, A 221 350 21 08, BG
• Emplacement sur le véhicule: Arrière, Gouche
• Catégorie: Kits de suspension complets

Purpose and Function in Suspension

The left rear knuckle in the Mercedes W221 is the central element to which suspension components, the wheel hub, and braking system elements are attached. It is responsible for:

• maintaining the correct geometry of the rear axle,
• stable wheel guidance under longitudinal and lateral loads,
• proper cooperation with control arms and other components from the Suspension Replacement Kits category,
• transferring forces from the road surface to the body without undesirable deformations.

Thanks to its dedicated placement on the vehicle: rear – left side, the component is structurally adapted to the specifics of the rear axle in the Mercedes W221, which facilitates installation and maintenance of factory driving parameters.

Compatibility and Identification Parameters

The knuckle has been designed as an original part for Mercedes vehicles, ensuring compatibility with factory mounting points and predictable suspension behavior. The element has an assigned OEM part number, as well as appropriate interchangeable numbers, which facilitates verification of compatibility with a specific body version and suspension system.

Additionally, the product is marked with a unique SKU, which allows for quick identification of the correct variant in the parts catalog, minimizing the risk of errors when selecting a component for a specific vehicle instance.

Condition, Origin, and Benefits of Use

The offered knuckle is a used part, sourced from disassembly, which allows for a reasonable repair cost while maintaining the original suspension design. Choosing parts from this group is particularly beneficial for advanced premium models, where maintaining factory geometry and stiffness is important for driving comfort.

• original design adapted to the W221 platform,
• preservation of factory suspension and brake mounting points,
• a reasonable compromise between repair cost and component quality,
• possibility of professional refurbishment of other suspension components based on the original knuckle.

By using the original left rear knuckle, the vehicle's original driving characteristics can be effectively restored after mechanical damage, corrosion, or wear and tear.

Vehicle Placement and Installation Aspects

The precisely defined placement on the vehicle (rear, left side) eliminates the risk of errors when selecting mirrored parts. The knuckle is structurally prepared to work with the standard Mercedes W221 suspension, allowing for the maintenance of:

• correct wheel camber and toe angles after geometry alignment,
• vehicle stability at higher speeds and during braking,
• cohesion of suspension operation with safety systems (ABS, ESP – at a mechanical level).

After installation, a full rear axle geometry check is recommended to fully utilize the potential of the newly installed component and ensure even tire wear.

Related Suspension Components and Additional Materials

If you are planning a comprehensive rear axle repair and also need other suspension components dedicated to this brand, check the available parts in the Mercedes Suspension Replacement Kits category.

To better understand the structural differences between standard and sports suspension and to make informed choices about used parts, it is worth reading the technical guide: Standard vs. Sports Suspension – Construction Differences and Selection of Used Suspension Parts. The article helps assess when the use of a used knuckle is justified and how to select other components to maintain the cohesion of the entire system.