Automatic Gearbox BMW F20 120d F30 320d F32 420d B47 8648924 GA8HP50Z WARRANTY

Listing details

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

Automatic Gearbox BMW F20 120d F30 320d F32 420d B47 GA8HP50Z is a factory-original component from the Automatic Gearboxes group, designed for BMW models equipped with the B47 engine. It offers precise, smooth gear shifting and serves as a solid foundation for professional drivetrain repair in 1, 3, and 4 Series vehicles.

Specifications and technical data

• SKU: 8648924
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8648924
• Substitutable numbers: 24008648924, 8648924
• Gearbox type: Automatic
• Category: Automatic Transmission

Purpose and compatibility

The presented automatic gearbox has been designed to work with the B47 powertrain in BMW F20 120d, F30 320d, and F32 420d models. The OEM construction ensures a proper fit to factory mounting points, correct integration with the vehicle's electronics, and the preservation of original drivetrain performance characteristics.

The Automatic gearbox type features an integrated gear shift control system, optimized for driving comfort, smooth acceleration, and stable operation across a wide range of loads.

Construction and operating characteristics

The gearbox is based on the GA8HP50Z design used in modern BMW models, which translates into a multi-stage transmission with closely spaced gear ratios. This configuration allows the engine to be kept in the optimal RPM range, improving dynamics and drivetrain refinement.

Automatic gear control allows for:

• efficient acceleration without jerking,
• stable operation at highway speeds,
• effective utilization of the B47 engine's torque.

Thanks to its factory design, the gearbox maintains compatibility with the vehicle's original control maps, which facilitates integration with the existing installation and onboard systems.

Application in service practice

A used automatic gearbox of this type is often chosen as a solution for major transmission failures, where repairing the existing unit is uneconomical or technically difficult. Using a complete unit allows for reduced vehicle downtime and simplifies the repair process in the workshop.

In service practice, the following are particularly valued:

• factory origin of the component,
• compatibility with the automatic control system,
• possibility of selection based on OEM and reference numbers.

Selecting a gearbox according to the manufacturer's markings minimizes the risk of incompatibility and facilitates correct configuration after installation.

Benefits of choosing a used automatic gearbox

Choosing a used automatic gearbox for a BMW allows for significant repair cost savings compared to purchasing a brand-new component, while maintaining the original design and operating characteristics. This solution is particularly beneficial for vehicles used intensively, where a reasonable cost-to-service-effect ratio is important.

More information on how to consciously approach the purchase of used drivetrain components, procedures for selection by VIN and OEM, and real cost differences can be found in our expert article Why it is worth buying used gearboxes and engines – facts instead of myths.

BMW automatic gearboxes – expansion and modernization

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 a torque converter, control elements, or additional hydraulic components, check out the available parts in the BMW automatic gearboxes category.