BMW X3 G01 X4 G02 M40dX B57 Automatic Gearbox GA8HP75X 8744948 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 G01 X4 G02 M40dX B57 Automatic Gearbox GA8HP75X is a factory-original automatic transmission designed for modern BMW X-series diesel engines. This used gearbox from this series is valued for its smooth operation, quick gear shifts, and high level of performance in daily use. It is a solution for users who expect consistent cooperation with the diesel engine and the preservation of the original driving characteristics of M40d models.

Specifications and technical data

• SKU: 8744948
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8744948
• Substitutable numbers: 8744948, 24008744948, 8740646, 24008740646, 8486545, 24008486545
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: Automatic Transmission

Purpose and compatibility

The described automatic transmission has been designed for use in BMW X3 G01 and BMW X4 G02 models in M40d versions with the B57 engine. The transmission design is adapted to the high torque of the diesel unit, which allows for stable power transmission across a wide range of loads. As a result, the dynamics and driving comfort characteristic of these models are maintained, both in city traffic and on the highway.

Operating characteristics of the automatic transmission

The automatic transmission from the GA8HP75X family offers multi-stage gear ratios, which translates into smooth acceleration and optimal use of the diesel engine's RPM range. The tuning of the gearbox with the BMW drivetrain ensures:

• efficient, sequential gear changes during dynamic acceleration,
• stable gear holding during steady driving,
• effective use of torque in the low and mid-RPM ranges.

An automatic transmission configured in this way supports both a calm and a more dynamic driving style, maintaining predictable throttle response and comfortable drivetrain operation.

Application in diesel units

The gearbox is designed to work with a diesel engine, which is significant for durability and gear-shifting characteristics. The software and construction of the transmission are adapted to the specifics of the high torque available at low RPMs, typical of modern B57 units. Thanks to this:

• gear downshifts occur in a predictable and repeatable manner,
• the transmission maintains the appropriate gear ratio under loads typical of highway driving,
• the drivetrain retains its factory fuel consumption characteristics.

Condition, origin, and benefits of choosing a used part

The offered gearbox comes from the segment of original BMW components and is a used item, which allows for economical repair or replacement of the transmission while maintaining compliance with factory specifications. Choosing an original, used automatic transmission from this series is a solution that:

• reduces the risk of compatibility issues with the vehicle's electronics,
• ensures the preservation of factory drivetrain operating parameters,
• allows for cost-effective restoration of vehicle performance.

BMW automatic transmissions – further drivetrain expansion

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 transmissions, complete automatic drive units, or compatible control modules, check the available parts in the BMW automatic transmissions category.

How to consciously buy a used automatic transmission

When choosing a used automatic transmission, it is worth paying attention to compatibility with the specific engine variant, fuel type, and the type of transmission used. It is also helpful to understand typical signs of wear and ways to verify the condition of the gearbox before installation. Practical tips, differences between manual, automatic, and DSG transmissions, as well as a checklist for purchasing, can be found in the article Gearbox: manual, automatic, or DSG – typical faults and a guide to buying a used gearbox, which facilitates making an informed service decision.