BMW X3 F25 X5 F15 X4 F26 X6 F16 Transfer Box Transmission 8643151 WARRANTY

Listing details

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

BMW X3 F25 X5 F15 X4 F26 X6 F16 Transfer Box Transmission is a specialized drivetrain component designed for BMW models with all-wheel drive and automatic transmission. This transfer box, belonging to the Transfer Cases category, is responsible for the precise distribution of torque between the axles, which is crucial for vehicle traction and stability. This used OEM component is a solution for users looking for a technically compatible part at a reasonable price.

Specifications and technical data

• SKU: 8643151-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8643151
• Substitutable numbers: 27108643151, 8643151, 27107505376, 7505376, 27108623348, 8623348, 27107639265, 7639265, 7643760, 27108612554, 8612554, 27107649784, 7649784, 27608643153, 8643153, 27607649785, 7649785, 27607639261, 7639261, 27107636180, 7636180, 5A371E2
• Gearbox type: Automatic
• Part type: Transfer Case
• Category: Transfer Cases

Purpose and compatibility

The automatic transmission transfer box has been designed for BMW X-series vehicles, such as the X3 F25, X5 F15, X4 F26, and X6 F16, equipped with all-wheel drive and an automatic transmission. The OEM design ensures a proper fit with the factory drivetrain, which facilitates installation and reduces the need for additional modifications.

Thanks to the use of the original drivetrain architecture, the transfer box works with the vehicle's factory electronics and mechanics, maintaining the performance characteristics intended by the manufacturer. The presence of dedicated interchangeable numbers allows for verification of compatibility with a specific vehicle configuration.

Technical characteristics and role in the drivetrain

The transfer box, which is part of the Transfer Cases category, is responsible for transferring and distributing torque from the automatic transmission to the front and rear axles. In practice, this affects:

• vehicle stability during acceleration and engine braking,
• the car's behavior on slippery surfaces,
• smooth cooperation with traction and stability control systems.

The version designed for automatic transmissions is adapted to the operating characteristics of such a gearbox, including higher gear-shifting comfort and specific dynamic loads. The use of an appropriate transfer box is particularly important in vehicles with higher weight and power, such as BMW X-series SUVs.

Practical application and benefits of installation

Replacing the transfer box in a BMW X3, X4, X5, or X6 is recommended in the event of symptoms such as noise from the drivetrain area, jerking when starting, incorrect drive distribution, or traction system errors. Using a used OEM component allows you to:

• restore the proper operation of the all-wheel drive,
• maintain the factory vehicle handling parameters,
• optimize repair costs compared to purchasing a new unit.

This is a particularly attractive solution for users who expect a technically compatible part while wanting to limit expenses related to servicing an advanced drivetrain. A properly selected transfer box helps maintain the combination of comfort and handling precision characteristic of BMW.

Choosing a used transfer box and technical aspects

When choosing a used transfer box for a BMW, it is crucial to verify compatibility with the specific engine version, model year, and type of automatic transmission. Both the OEM part number and available interchangeable numbers are helpful in this regard, allowing the component to be matched to a specific vehicle. It is also worth paying attention to consistency with the factory drivetrain control software.

To better understand when choosing a used unit is cost-effective and what to look for when purchasing, it is worth reading the guide: Used transmission – when is it worth it and what you need to remember. The article discusses, among other things, the differences between manual and automatic transmissions as well as issues of compatibility and repair cost-effectiveness.

Expanding the BMW drivetrain

If you are planning a comprehensive repair or upgrade of the drivetrain area in your BMW and need other elements from the same group, such as additional transfer boxes, other variants of transfer cases, or related drivetrain components, check the available parts in the BMW Transfer Cases category.

Choosing components from one consistent product group makes it easier to maintain proper cooperation between the transfer box, the automatic transmission, and other drivetrain sub-assemblies, which translates into stable and predictable operation of the entire system.