BMW G11 G12 G30 G31 Transfer Case Box Transmission ATC13 8487143 WARRANTY

Listing details

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

BMW G11 G12 G30 G31 Transfer Case Box Transmission ATC13 is an original BMW drivetrain component designed for all-wheel-drive models. Thanks to its factory-engineered design, it ensures precise torque distribution between the axles, stable xDrive operation, and predictable vehicle behavior in various road conditions. This is the solution for users seeking a proven OEM component rather than replacements with uncertain specifications.

Specifications and technical data

• SKU: 8487143
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8487143
• Substitutable numbers: 8487143, 27108487143, 8684859, 27108684859
• Category: Transfer Cases

Purpose and role in the drivetrain

The presented transfer case belongs to the Transfer Cases category and serves as a central drivetrain component in selected BMW 7 Series (G11, G12) and 5 Series (G30, G31) models. Its task is to transfer and modulate torque between the front and rear axles, which contributes to:

• driving stability at higher speeds,
• traction during starting and acceleration,
• safe vehicle behavior on wet, slippery, or uneven surfaces,
• even load distribution on drivetrain components.

Selecting a transfer case dedicated to a specific BMW generation minimizes the risk of compatibility issues, controller errors, or improper drivetrain operation.

Construction and technical characteristics

The ATC13 transfer case is designed as an integrated module that works with the factory transmission and BMW electronics. Its construction provides:

• precise fitment with the transmission housing and drive shafts,
• gear ratios designed by the manufacturer, matched to the engine characteristics and vehicle weight,
• compatibility with traction control and electronic stability systems.

Original manufacturing ensures the maintenance of factory drivetrain performance parameters, which is particularly important in premium-class vehicles where smooth operation and predictable system response are essential.

Benefits of using an original BMW transfer case

Using an original transfer case in a BMW G11, G12, G30, or G31 allows for maintaining the integrity of the entire drivetrain. In practice, this means:

• factory fitment for the specific platform and drivetrain configuration,
• proper cooperation with control software,
• reduced risk of improper torque distribution and jerking while driving,
• easier diagnostics at the service center due to compliance with manufacturer documentation.

For users who drive their vehicles intensively (highway travel, high mileage, variable weather conditions), choosing an original transfer case is a more predictable solution than installing a random replacement.

Condition, origin, and selection by part numbers

The offered item is an original BMW part from the secondary market, which allows for combining reasonable costs with the preservation of factory specifications. In the case of such an advanced component as a transfer case, it is crucial to match it by OEM number and interchangeable numbers – this allows for verifying compatibility with the specific engine and drivetrain version of the vehicle.

To better understand how to safely choose used drivetrain components, including transfer cases, it is worth reading our expert guide: Why it is worth buying used transmissions and engines – facts instead of myths. The article discusses, among other things, selecting parts by OEM numbers, verification procedures, and real cost differences compared to new components.

Expansion and modernization of the BMW drivetrain

If you are planning a comprehensive repair or modernization of the drivetrain area in your BMW and need other elements from the same group, such as additional transfer cases, alternative transfer case configurations, or compatible modules working with the drive system, check the available parts in the BMW Transfer Cases category.

Such an approach allows for planning service work in a consistent manner – using components from the same construction group, which facilitates installation, diagnostics, and subsequent service maintenance.