Mercedes W901 W902 W905 Suspension Rubber Buffer Front Axle Stopper A9013220444

Mercedes W901 Front Suspension Shock Absorber Bump Stop is a precisely fitted suspension component designed for the front axle. It is responsible for controlled limitation of the shock absorber's travel, improving ride comfort and protecting other suspension components. Thanks to its design aligned with Mercedes solutions, the bump stop ensures proper cooperation with the factory shock absorber and vehicle geometry.

Specifications and technical data

• SKU: A9013220444
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A9013220444
• Substitutable numbers: A9013220444, A 901 322 04 44
• Location on the vehicle: Front
• Category: Shocks, Struts & Assemblies

Function and Role of the Bump Stop in the Suspension System

The front shock absorber bump stop in W901 series models plays a crucial role in protecting mechanical elements from overload during maximum suspension compression. When the shock absorber approaches the end of its working stroke, the bump stop absorbs some of the energy, reducing the risk of bottoming out and damage to the piston rod, mountings, and body components.

A correctly selected bump stop:

• stabilizes the front suspension's operation under heavy loads,
• reduces the transmission of vibrations and impacts to the body,
• supports predictable vehicle behavior in critical road situations.

Purpose and Fitment for the Front Axle

The presented component is designed for installation on the front axle, which is significant both structurally and in terms of the loads acting on the suspension. The front of the vehicle carries a significant portion of the weight and is responsible for steering, therefore, a proper shock absorber bump stop influences:

• more predictable car behavior during braking,
• better vehicle control over uneven surfaces,
• reduction of excessive roll and bottoming out under full load.

Thanks to its compatibility with original Mercedes solutions, installation is similar to replacing an original part, without the need for suspension modifications.

Category Shock Absorbers and Struts – Consistency with the Suspension System

The bump stop belongs to the Shock Absorbers and Struts group, which are elements directly responsible for damping vibrations and wheel guidance. The correct selection of components from this category is important for:

• maintaining driving stability,
• even tire wear,
• preserving original comfort and safety parameters.

If you are planning a comprehensive repair or upgrade of the front suspension area in your Mercedes and need other parts from the same group, such as shock absorbers, struts, or mounting components, check the available parts in the Mercedes Shock Absorbers and Struts category.

Product Characteristics and Condition

The shock absorber bump stop is offered as a part from the Shock Absorbers and Struts group, originating from a Mercedes vehicle. The product is in used condition, meaning it comes from a previously operated car but retains functionality allowing for further operation in the suspension system. This is a particularly beneficial solution for service repairs where structural compatibility with the original solution is important.

For ease of identification, dedicated catalog numbers and interchangeable numbers are used, allowing the bump stop to be matched to the specific suspension configuration of a given vehicle. Before purchasing, it is advisable to compare the parameters with the currently installed component to ensure full compatibility.

Operation, Diagnostics, and Technical Knowledge

A functional shock absorber bump stop directly impacts the durability of the entire suspension system. Signs of wear or damage may include noticeable suspension bottoming out on larger bumps, metallic clunks during full compression, or a decrease in ride comfort. Regular inspection of the bump stops' condition, especially on the front axle, is recommended during every major suspension service.

If you want to better understand the interaction of bump stops with shock absorbers, control arms, and stabilizers, and their impact on driving safety, it is worth referring to the guide: Suspension System – A Comprehensive Guide to Shock Absorbers, Control Arms, and Stabilizers.

For users interested in maximizing the potential of used parts and their proper maintenance, a practical guide may also be helpful: How to Extend the Lifespan of Used Car Parts?.