Mercedes Sprinter W903 Rear Axle Differential Diff A9033503100 741408 37:9 4,111

Listing details

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

Mercedes Sprinter W903 Rear Axle Differential Diff is a complete rear drive unit from the Differentials category, designed for installation in the vehicle's rear axle. This is a solution for users who need a proven, used drive axle with a specific gear ratio, ensuring stable torque transmission and predictable vehicle behavior under load. Thanks to the original Mercedes design, this component allows for maintaining the proper driving characteristics of the Sprinter W903.

Specifications and technical data

• SKU: A9033503100
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A9033503100
• Substitutable numbers: A9033503100, A 903 350 31 00, A0003500400, A 000 350 04 00
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function of the rear axle

The presented drive axle is dedicated to the vehicle's rear axle, where it is responsible for distributing power to the wheels and maintaining the correct gear ratio between the driveshaft and the wheel hubs. The applied final drive ratio has been selected for the characteristics of the Mercedes Sprinter W903, which translates into predictable acceleration, appropriate engine RPM at cruising speeds, and stability when fully loaded.

For commercial vehicles such as the Sprinter, a properly selected differential is crucial for fuel economy, drivetrain durability, and driver comfort. The rear axle in this configuration will perform well in both delivery applications and specialized conversions, where repeatable, predictable drivetrain behavior is essential.

Benefits of using an original Mercedes differential

Using an original rear axle from the Sprinter W903 series provides:

• Factory fitment to the suspension geometry and drivetrain of the Mercedes, without the need for structural modifications.
• Consistency of gear characteristics with the manufacturer's factory specifications, which makes it easier to maintain predictable engine RPM at typical operating speeds.
• Better compatibility with existing drivetrain components, such as the driveshaft, hubs, and suspension mounts.

For fleets and workshops servicing Sprinters, this means the possibility of faster replacement, reduced vehicle downtime, and easier verification of part compliance with service documentation. A used drive axle is also an economically attractive alternative to new components, while maintaining the factory design.

Rear axle application and installation aspects

The axle has been designed to operate in the rear of the vehicle, where it carries loads resulting from cargo weight and traction forces. The design of the Sprinter W903 differential is prepared to work with the typical suspension and braking system of this generation, which facilitates installation in workshop conditions. Thanks to the retention of the original housing and mounting points, it is possible to use standard brackets, bushings, and associated components.

When selecting a rear axle, it is crucial to match the gear ratio to the drive configuration and expected driving style – a vehicle operating mainly in the city has different requirements than a vehicle used on long routes with a full load. A properly selected differential reduces excessive stress on the gearbox and improves the overall refinement of the drivetrain.

How to choose the axle ratio for your driving style

The selection of the drive axle ratio should be based on the actual way the vehicle is used: frequency of driving with a load, typical speeds, and route profile. A different ratio will be beneficial for a vehicle that spends most of its time in city traffic, and another for a vehicle used mainly on highways. Proper gear staging allows for optimizing fuel consumption, reducing noise, and improving component durability.

If you want to better understand how the axle ratio affects dynamics and driving economy, a detailed guide will be helpful: Dismantled drive axles and differentials – how to choose ratios for your driving style. You will find practical tips, definitions, and examples of configurations used in various models there.

Expanding the drivetrain in a Mercedes

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 axles, differentials, or complete drive units, check the available parts in the Mercedes Differentials category.

By choosing elements from one consistent design group, you make it easier to control the compatibility of gear ratios, mounting types, and the operating characteristics of the entire system. This is particularly important in commercial vehicles, where predictability, repeatable parameters, and the possibility of quick service maintenance are what count.