Mercedes W203 Rear Axle Differential Diff A2033504394 WARRANTY

Listing details

The differential is sold with a 90-day warranty! It was tested before removal and is in full working order.

Mercedes W203 Rear Axle Differential Diff is an original drivetrain component designed for installation on the vehicle's rear axle. This used differential from the Differentials category allows for the restoration of proper torque transfer to the wheels and stable drivetrain operation. This is a solution for users who expect a proven, factory-spec design instead of unreliable aftermarket replacements.

Specifications and technical data

• SKU: A2033504394
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2033504394
• Substitutable numbers: A2033504394, A 203 350 43 94
• Location on the vehicle: Rear
• Part type: Differential & Housing Assembly
• Category: Differentials

Purpose and function of the differential

The described rear differential is the component responsible for torque distribution between the rear axle wheels, while simultaneously compensating for rotational speed differences when cornering. A properly selected and functional differential contributes to:

• vehicle handling stability in corners,
• even tire wear,
• drivetrain refinement,
• reduction of loads transferred to the half-shafts and transmission.

Its placement on the rear axle makes it a key component for rear-wheel-drive vehicles, where precise differential operation translates into predictable car behavior in various road conditions.

Benefits of using an original rear differential

Using an original differential in a Mercedes W203 ensures structural compatibility with the factory drivetrain. As a result:

• the correct gear ratios selected by the manufacturer for the vehicle's weight and characteristics are maintained,
• there is no need to interfere with additional drivetrain components,
• the risk of improper fitment with mounts and half-shafts is minimized.

A used differential is an economical solution, allowing for the restoration of drivetrain efficiency without the need to invest in new, expensive components. For many users, this is a reasonable compromise between cost and functionality.

Selecting a differential for driving style and vehicle configuration

When replacing the rear differential in a Mercedes W203, it is essential to match the gear ratios to the existing drivetrain configuration and the expected vehicle performance. This affects:

• the vehicle's response to acceleration and engine braking,
• engine RPM at highway speeds,
• acoustic comfort in the cabin.

To better understand the relationships between final drive ratios, the differential, and driving style, it is worth checking out our guide: Dismantled drive axles and differentials – how to choose gear ratios for your driving style. The article technically discusses definitions, component compatibility, and practical configuration examples.

Installation area and service aspects

The differential mounted on the rear axle requires precise seating in the mounting points and proper connection to the half-shafts and driveshaft. During installation, it is worth paying attention to:

• the condition of mounting elements and bushings,
• the tightness of connections and the condition of seals,
• the selection of the appropriate gear oil in accordance with the vehicle manufacturer's recommendations.

Professional installation and proper operation translate into a longer service life of the differential and stable drivetrain performance in daily use.

Expanding the Mercedes drivetrain

If you are planning a comprehensive repair or upgrade of the drivetrain area in your Mercedes and need other elements from the same group, such as additional differentials, drive axles, or related components, check out the available parts in the Mercedes Differentials category.