Mercedes ML W164 Rear Differential Diff 3,45 Ratio A1643500414 WARRANTY

Listing details

The gearboxes are sold with a 90-day warranty! They were tested before removal and are in full working order.

Mercedes ML W164 Rear Differential Diff 3,45 Ratio is a complete rear drive axle assembly designed for the ML W164 series. This component ensures the correct 3.45 gear ratio, stable operation of the drivetrain, and predictable vehicle behavior both on-road and off-road, providing a solid foundation for professional rear-drive repairs.

Specifications and technical data

• SKU: A1643500414
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1643500414
• Substitutable numbers: A1643500414, A 164 350 04 14
• Location on the vehicle: Rear
• Category: Additional Differential Parts

Purpose and function in the drivetrain

The described rear axle is responsible for torque distribution to the rear wheels and maintaining the correct 3.45 gear ratio, in accordance with the factory drivetrain specifications. Mounted on the vehicle's rear axle, it works in conjunction with the driveshaft and half-shafts, influencing acceleration dynamics, drivetrain refinement, and noise levels during operation.

Selecting the correct differential with the appropriate gear ratio is crucial for maintaining consistency with the transmission and the vehicle's electronic systems, such as stability control or all-wheel-drive systems.

Benefits of using an original rear axle

Using an original rear axle dedicated to the ML W164 series allows for the preservation of factory drivetrain performance parameters. The most important advantages of this solution include:

• Structural compatibility with the factory suspension and drivetrain system, with no need for mounting modifications.
• A properly selected 3.45 gear ratio, ensuring predictable performance and correct interaction with the vehicle's electronics.
• The ability to restore proper rear axle operation following mechanical failure or wear and tear of the previous differential.
• Stable vehicle handling under load, especially in vehicles used for towing or off-road driving.

Application in service practice

The rear axle with a 3.45 ratio is particularly useful in situations where the existing differential has suffered mechanical damage, or where there is noticeable play, noise under load, or leaks. Replacing the complete axle often reduces repair time compared to rebuilding individual components and limits the risk of repeated interventions in the drivetrain.

Due to its location on the rear axle, this component has a direct impact on acoustic comfort inside the cabin and the smoothness of power delivery during acceleration and deceleration. A correctly selected and functional differential reduces vibrations and unwanted noise, which translates into a more comfortable driving experience.

Characteristics of the used product

The offered axle belongs to the group of used parts, which in service practice often represents an economically justified alternative to new components. With proper technical verification and correct installation, such a component allows for a significant reduction in repair costs while maintaining functionality consistent with the vehicle manufacturer's requirements.

This solution is particularly attractive for vehicles that are used intensively or have higher mileage, where the priority is to maintain drivetrain efficiency with reasonable financial expenditure.

Support for selection and repairs of older models

In the case of older ML W164 units, the availability of new components in authorized networks may be limited. In such a situation, a well-selected rear axle from the secondary market allows for the effective restoration of vehicle performance. To better understand the advantages of this solution and the principles of safely using salvaged parts, it is worth reading the article: No parts at the dealership? How to handle repairs of older models using salvaged parts.

Related Mercedes drivetrain components

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, axle housings, or accessory mounting parts, check the available parts in the category Other Mercedes differential parts.

Summary

Mercedes ML W164 Rear Differential Diff 3,45 Ratio is a practical solution for users and workshops looking to restore proper rear-drive operation while maintaining the correct gear ratio. A properly selected and correctly installed axle ensures stable handling, predictable performance, and smoother drivetrain operation, which directly translates into the comfort and safety of vehicle operation.