Mercedes ML W164 Rear Axle Differential Diff 3,45 Ratio A1643500814 WARRANTY

Listing details

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

Mercedes ML W164 Rear Axle Differential Diff 3,45 Ratio is an original drivetrain component designed for installation on the rear axle of Mercedes ML-Class W164 generation models. This component from the Differentials category ensures proper torque distribution to the rear wheels, which translates into stable handling, predictable traction, and safe drivetrain operation in daily use.

Specifications and technical data

• SKU: A1643500814
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1643500814
• Substitutable numbers: A1643500814, A 164 350 08 14
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function in the drivetrain

The described rear drive axle is dedicated for use on the vehicle's rear axle, where it is responsible for precise torque transfer from the driveshaft to the half-shafts. The 3.45 gear ratio is characteristic of a configuration that combines reasonable dynamics with comfortable, smooth drivetrain operation, which fits well with the character of a premium SUV like the Mercedes ML W164.

A properly selected rear differential reduces stress in the system, stabilizes the operation of the automatic or manual transmission, and influences driving refinement at higher speeds. As a result, the vehicle maintains predictable reactions both during acceleration and while driving at a constant speed.

Advantages of using an original rear differential

Using an original rear differential in a Mercedes ML W164 allows you to maintain factory drivetrain performance parameters. Key benefits include:

• Structural compatibility – perfect fit for the rear axle geometry and factory suspension of the ML W164 model.
• Consistency with the factory traction control and electronic stability program.
• Properly selected 3.45 gear ratio, supporting comfortable driving characteristics.
• Ability to utilize existing mounting points and factory installation solutions.

Thanks to this, the installation process is straightforward, without the need for structural modifications, and the vehicle retains parameters close to the original configuration.

Vehicle placement and installation aspects

The differential is designed for installation in the rear of the vehicle, on the rear axle, where it works in conjunction with the driveshaft and half-shafts. This placement requires maintaining proper suspension geometry and correct driveshaft operating angle, which is why it is essential that the part comes from the correct model application.

During replacement, it is recommended to:

• check the condition of the axle mounts and suspension bushings,
• verify the tightness of connections and the condition of the oil in the system,
• check for play in the half-shafts after installation.

This approach allows you to fully utilize the potential of the installed differential and reduce the risk of additional service work in the future.

Characteristics of the used product

The offered item comes from the secondary market, which means it is a used rear differential. This type of component is a reasonable choice for repairs where maintaining the original design while optimizing costs is key. In practice, this allows you to restore proper drivetrain operation without the need to invest in a brand-new subassembly.

Before installation, it is worth performing a standard service check, including an assessment of tightness, potential play, and the condition of the lubricant. This ensures that the differential can continue to operate in the vehicle in a stable and predictable manner.

Gear ratio selection and technical knowledge

When replacing the rear axle in a Mercedes ML W164, it is crucial to match the gear ratio to the drivetrain configuration and the user's driving style. Proper selection affects:

• acceleration characteristics and engine flexibility,
• engine RPM at highway speeds,
• fuel consumption and acoustic comfort.

To better understand the relationship between axle ratios and vehicle behavior, it is worth consulting a specialized guide. A detailed discussion of the topic, along with examples and practical tips, can be found in the article Dismantled drive axles and differentials – how to choose gear ratios for your driving style.

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 related components, check out the available parts in the Mercedes Differentials category.