BMW X3 F25 X4 F26 F07 F10 F11 F20 F21 F34 Front Differential Diff 3,08 WARRANTY

Listing details

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

BMW X3 F25 X4 F26 F07 F10 F11 F20 F21 F34 Front Differential Diff 3,08 WARRANTY is a factory drivetrain component from the Differentials category, designed for installation on the front axle of selected BMW models. The properly selected gear ratio ensures stable torque transfer, correct cooperation with the vehicle's electronics, and predictable car handling in various road conditions.

Specifications and technical data

• SKU: 7591998
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7591998
• Substitutable numbers: 31507591998, 7591998, 31507591997, 7591997, 31507648880, 7648880, 31507648881, 7648881, 8618381
• Location on the vehicle: Front
• Category: Differentials

Purpose and function of the differential

The front differential in the xDrive system is responsible for distributing drive between the front axle wheels, maintaining proper wheel rotation while driving straight and cornering. In BMW X3 F25, X4 F26, and 5 Series F10 models, a correctly selected differential contributes to:

• driving stability under varying loads and grip conditions,
• smooth torque transfer to the front axle,
• reduction of unwanted vibrations and noise in the drivetrain.

By maintaining the factory design, this component allows for the preservation of handling characteristics consistent with the manufacturer's specifications.

Construction and performance parameters

The front differential used in this reference utilizes a 3,08 gear ratio, which is crucial for matching specific engine and transmission versions. The use of the correct gear ratio translates into:

• consistent operation with the rear axle and transmission,
• proper functioning of assistance systems (e.g., traction and stability control),
• maintaining factory engine RPM at a given driving speed.

As a component from the Differentials group, this differential is structurally prepared to handle loads typical for all-wheel drive in premium segment vehicles.

Vehicle placement and installation

The presented differential is designed for installation on the front axle, which is critical when selecting parts for a specific vehicle. Proper placement on the vehicle ensures:

• compatibility with factory mounting points in the subframe,
• correct axle shaft guidance and maintenance of suspension geometry,
• seamless integration with the existing xDrive system.

Before installation, it is recommended to verify the compatibility of the gear ratio and differential type with the specific car configuration to avoid discrepancies in drive operation and errors in electronic systems.

Characteristics of the used product

The offered differential is a used component, sourced from dismantling, which allows for cost-effective drivetrain repair while maintaining original BMW specifications. Such components are frequently chosen for:

• replacing a damaged differential after a mechanical failure,
• repairs following collisions involving the front of the vehicle,
• restoring the car to factory configuration after previous modifications.

Using an original differential from dismantling reduces the risk of fitment issues typical of aftermarket replacements with ambiguous specifications.

Fitment, reference numbers, and technical knowledge

This differential model has a dedicated OEM part number and a set of interchangeable numbers, which facilitates precise identification in BMW catalogs and comparison with the component currently installed in the vehicle. In case of doubt, it is worth comparing the markings with the data in the technical specifications and service documentation of the specific model.

To better understand the relationship between differential gear ratios, drive characteristics, and driving style, the guide article Dismantled drive axles and differentials – how to choose gear ratios for your driving style will be helpful, where practical configuration examples and the most frequently asked user questions are discussed.

If you are planning a comprehensive repair or upgrade of the drivetrain area in your BMW and need other components from the same group, such as front axles, final drives, or other differentials, check the available parts in the BMW Differentials category.