Mercedes W447 Rear Hub Cover Arch Splash Guard Left N/S A4478890300

The Mercedes W447 Rear Wheel Arch Hub Cover Left is a precisely fitted body part designed to protect the rear left wheel arch area of Mercedes vehicles. As part of the Mudguards group, it effectively limits dirt and water spray directed at the hub and suspension components, improving driving comfort in daily use. A used OEM component ensures proper mounting geometry and compatibility with factory mounting points.

Specifications and technical data

• SKU: A4478890300
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A4478890300
• Substitutable numbers: A4478890300, A 447 889 03 00
• Location on the vehicle: Rear, Left
• Part type: Splash Guard
• Category: Splash Guards & Mud Flaps

Purpose and Technical Function

The left rear wheel arch hub cover is specifically designed for the Mercedes W447 platform, taking into account the body shape and suspension component layout. Its purpose is to:

• limit direct contact of the hub and surrounding components with water, mud, and road salt,
• stabilize the stream of debris thrown by the rotating wheel,
• support the function of components in the Mudguards group in the rear of the vehicle.

Thanks to its dedicated placement in the rear – left side of the vehicle area, the cover works in conjunction with the wheel arch and other covers to create a cohesive protective system.

Construction and Fit for Mercedes W447

The part has been developed as an original component for a specific Mercedes generation, which translates to a proper fit with the bodywork and predictable behavior during driving. The cover's design includes:

• a profile tailored to the geometry of the wheel arch and rear hub,
• space for suspension movement throughout its full range of operation,
• provisions for factory mounting points, which facilitates installation.

This solution allows for the preservation of the original airflow and debris trajectory within the wheel arch, without interfering with other body components.

Benefits of Using an Original Hub Cover

Using an original rear wheel arch hub cover on a Mercedes W447 offers a range of practical operational benefits:

• Enhanced Hub Area Protection – limiting the direct impact of external factors on the hub, mounting components, and suspension parts.
• Support for the braking system in the rear axle by reducing the amount of dirt in the wheel area.
• Maintenance of the factory standard of wheel arch assembly, which is important for inspections and bodywork/mechanical repairs.
• Visual and structural consistency with other wheel arch components, without the need for modifications.

A used OEM part is a sensible choice for accident repairs or operational replacements when preserving the original construction at controlled costs is a priority.

Mounting Area and Service Application

The cover is intended for installation in the rear left part of the wheel arch, in close proximity to the wheel hub. This location requires appropriate rigidity and shape to prevent interference with suspension operation or the rotating wheel. In workshop practice, this part is replaced, among other reasons, after:

• mechanical damage within the wheel arch area,
• disassembly of suspension or hub components,
• corrosion or cracks in the original cover.

Replacing it with an original rear wheel arch hub cover restores proper protection to this area without compromising on fit.

Expanding the Wheel Arch Protection System

If you are planning a comprehensive repair or upgrade of the wheel arch area in your Mercedes and need other parts from the same group, such as additional covers, protective profiles, or splash reduction elements, check the available parts in the Mercedes Mudguards category.

For a broader perspective on the importance of original body components and their impact on a vehicle's character, it is worth reading the article comparing classic and modern MINI constructions: Classic Mini vs. Modern MINI – How Construction Has Changed and Which Original Mini Parts Help Preserve Their Character.