Mercedes-Benz S-Class W221 Rear Differential Mount Support Bracket A2213521406

Mercedes W221 Differential Mount Bracket is a component from the Bumpers and Reinforcements group, designed for the rear body section, responsible for stable support and proper positioning of the differential. This used, original part ensures factory mounting geometry, which promotes correct drivetrain operation and driving comfort in W221 S-Class models.

Specifications and technical data

• SKU: A2213521406
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2213521406
• Substitutable numbers: A2213521406, A 221 352 14 06
• Location on the vehicle: Rear
• Category: Bumpers & Reinforcements

Purpose and Function in the Drivetrain

The differential bracket in the Mercedes W221 operates in the rear of the vehicle, where it is responsible for rigid yet controlled mounting of the differential to the body structure. A correctly selected component:

• maintains the correct position of the differential relative to the drive shafts and propeller shaft,
• limits undesirable movement during acceleration and engine braking,
• aids in reducing vibrations transmitted to the body,
• helps maintain the correct geometry of the rear drivetrain.

Thanks to this, the stability of the rear axle remains at the level expected of a premium sedan, and the drivetrain operates under conditions close to factory specifications.

Construction, Fitment, and Compatibility

The differential bracket belongs to the group of supporting elements that work with the rear body structure and the drivetrain assembly. Using a solution consistent with the factory design means:

• mounting geometry matched to the mounting points in the Mercedes W221,
• maintaining the connection stiffness intended by the manufacturer,
• easier installation without the need for structural modifications.

Proper fitment is crucial for the durability of other rear suspension components and for the even distribution of loads in the differential mounting area.

Characteristics of a Used Component

The offered differential bracket is a used component, which in practice means it comes from a dismantled vehicle and retains the original construction intended for this model. This type of part:

• enables economical repair of the rear drivetrain,
• allows for consistency with factory design solutions,
• is a good choice when replacing a worn or damaged mount.

For supporting elements, it is particularly important to maintain compliance with the manufacturer's design – this translates to safe load transfer and predictable vehicle behavior during driving.

Application in the Rear Body Section

The placement of the differential bracket in the rear zone of the vehicle means it operates in close proximity to the suspension, bumper, and structural reinforcement elements. A correctly selected component:

• supports the structural integrity of the rear body section,
• reduces the risk of excessive play in the drivetrain,
• helps maintain acoustic comfort inside the cabin.

For owners of W221 S-Class Mercedes, replacing a worn differential bracket with an original equivalent is an important step towards restoring predictable handling and drivetrain refinement.

Expansion of Modernization within Bumpers and Reinforcements

If you are planning a comprehensive repair or modernization of the rear section of your Mercedes and need other parts from the same group, such as reinforcements, beams, or additional structural elements, check the available parts in the Mercedes Bumpers and Reinforcements category.

For those interested in a broader perspective on selecting used drivetrain components, integration with the existing system, and practical aspects of installation, an article comparing solutions in sports constructions may be helpful – you can find it here: Go-Kart Feeling XXL – Used N18 Turbocharger vs. B48 in Mini Cooper S.