BMW X1 E84 Transfer Case Box Transmission ATC350 7619176 7610584 WARRANTY

The BMW X1 E84 ATC350 Transfer Case Gearbox is a specialized drivetrain component designed to work with the automatic transmission in the BMW X1 E84 model. It is responsible for precisely distributing torque between the axles, which translates to stable handling and predictable vehicle behavior in various road conditions. This is a solution for users seeking a technically matched component for their BMW, with confirmed compatibility with the xDrive system.

Specifications and technical data

• SKU: 7643748
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7643748
• Substitutable numbers: 27107643748, 7643748, 27107635755, 27107599257, 27107610584, 27107619176, 27107609194, 27107607638, 27102210717, 27107639266, 27107601813, 7635755, 7599257, 7610584, 7619176, 7609194, 7607638, 2210717, 7639266, 7601813, 27607619181, 7619181, 27105A371E5, 1053715, 27108697976, 8697976
• Gearbox type: Automatic
• Category: Transfer Cases

Purpose and Function in the Drivetrain

The ATC350 transfer case plays a crucial role in the power transmission system, working in conjunction with the automatic transmission and the xDrive system in the BMW X1 E84. Its task is to dynamically distribute torque between the front and rear axles, which supports traction on slippery surfaces, improves stability at higher speeds, and enhances safety during acceleration and braking in corners.

Thanks to appropriately selected gear ratios and a design tailored to the specific BMW platform, the transfer case ensures:

• consistent operation with the four-wheel-drive control electronics,
• smooth load transfer under typical operating conditions,
• proper cooperation with the factory stability control systems.

Compatibility and Interchangeable Numbers

The offered transfer case is designed as a component compliant with BMW's factory requirements for the X1 E84 model, which simplifies part selection for drivetrain repairs. The part has a dedicated OEM number and a set of interchangeable numbers that allow verification of compatibility with a specific vehicle configuration and production year. This enables a mechanic or service advisor to precisely match the transfer case to the existing gearbox and xDrive controller, minimizing the risk of incorrect selection.

Before purchasing, it is advisable to compare the markings with the service documentation or the currently installed component to confirm full compatibility with your specific BMW X1 E84.

Characteristics of a Used Component

The presented transfer case comes from the Transfer Cases category and is a used component, offering a reasonable compromise between repair cost and maintaining the vehicle's original specification. A used component of this type is often chosen as an alternative to costly refurbishment or purchasing a brand-new unit, especially for older model years where an economical yet technically correct repair is a priority.

In practice, this means the possibility of restoring the drivetrain's functionality while maintaining the original BMW construction, without the need to use aftermarket parts of uncertain quality or parameters deviating from factory specifications.

Cooperation with Automatic Transmission

The ATC350 transfer case has been developed to work with an automatic transmission, which is important for both the installation method and the overall system's operating characteristics. Using the correct type of transfer case ensures:

• correct communication with the transmission and xDrive control module,
• appropriate torque transfer across the full range of gears,
• maintenance of factory four-wheel-drive operating parameters.

This provides the driver with seamless operation of the automatic transmission and the drivetrain distribution system, without undesirable jerks or delays in response to changing traction conditions.

Assistance with Selection and Additional Materials

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

When deciding to purchase a used drivetrain component, it is worth understanding the specifics of the secondary market and the differences between refurbishment and replacement with a used part. A detailed discussion of these issues, divided into manual and automatic transmissions and an analysis of cost-effectiveness, can be found in the article Used Gearbox – When is it Worth It and What You Need to Know.