Automatic Gearbox BMW X3 G01 X4 G02 20dX B47D GA8HP51X 9455371 WARRANTY

Listing details

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

Automatic Gearbox BMW X3 G01 X4 G02 20dX B47D GA8HP51X is a factory-original automatic transmission from the Automatic gearboxes group, designed for BMW diesel engines. This used OEM component ensures a precise fit for the drivetrain while maintaining the performance characteristics specified by the manufacturer. It is an ideal solution for users who expect a proven design and full compliance with factory specifications.

Specifications and technical data

• SKU: 9455371
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9455371
• Substitutable numbers: 9455371, 24009455371
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: Automatic Transmission

Purpose and compatibility

The described automatic gearbox is dedicated to BMW X3 G01 and BMW X4 G02 models equipped with the 20dX B47D diesel engine. The transmission design has been developed for the specific torque parameters and operating characteristics of the diesel unit, which translates into predictable drivetrain behavior and correct integration with the vehicle's factory electronics.

By using an original automatic gearbox, consistency with the factory control software, gear-shifting logic, and driver assistance systems is maintained. This is particularly important in modern BMW SUVs, where the transmission is an integral part of the entire drivetrain.

Technical and design characteristics

The GA8HP51X automatic transmission is a modern solution used in diesel-powered vehicles. It has been designed for smooth gear shifting, efficient torque utilization, and reduced energy losses in the drivetrain. In practice, this means stable acceleration, predictable downshifts, and a comfortable driving experience both in the city and on the highway.

Integration with the diesel engine allows for maintaining optimal engine RPM, which promotes fuel economy and reduces mechanical stress. The applied automatic gear-shifting system minimizes the risk of errors resulting from incorrect gear selection, and the transmission construction itself is prepared for operation in the demanding conditions typical of the SUV segment.

Practical application and benefits of installation

Installing this gearbox in a BMW X3 G01 or X4 G02 with a 20dX B47D engine allows for restoring the proper operation of the drivetrain in the event of a failure of the previous transmission. Choosing a used OEM component is a solution that combines controlled costs with the preservation of the vehicle's factory performance characteristics.

• Consistency with factory configuration – a transmission designed to work with a specific type of diesel engine and control system.
• Automatic gear shifting – driving comfort in city traffic and on long journeys.
• Proper mounting fit – no need for mechanical adaptations typical of non-factory solutions.

For workshops and individual users, this means shorter repair times and a reduced risk of compatibility issues that may arise when using unsuitable replacements.

Condition, verification, and selection based on technical data

The offered gearbox is a used item, which in practice means a favorable cost-to-functionality ratio while maintaining the original BMW design. Before installation, a standard workshop verification procedure is recommended, including checking for leaks, inspecting connectors, and preparing the system for the first start-up after replacement.

To correctly select a transmission for a specific vehicle, it is worth using the manufacturer's markings and vehicle data, such as the engine configuration and the type of automatic gearbox used. Information on interchangeable part numbers can also be helpful to confirm the part's compatibility with a given model version.

If you want to better understand how to safely choose used drivetrain components, including automatic transmissions, it is worth reading our expert guide: Why it is worth buying used gearboxes and engines – facts instead of myths.

Repair expansion within 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 gearboxes, control elements, or related automation components, check out the available parts in the BMW automatic gearboxes category.