BMW F10 520i F20 125i F30 328i N20 Automatic Gearbox GA8HP45Z 8632475 WARRANTY

Listing details

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

BMW F10 520i F20 125i F30 328i N20 Automatic Gearbox GA8HP45Z is a factory-fitted automatic transmission from the ZF family, used in modern BMW models with petrol engines. This solution is designed for smooth gear shifting, high operating standards, and efficient torque transfer, which translates into a comfortable and predictable driving experience. Thanks to its design compliant with the manufacturer's standards, the gearbox is a direct replacement for the original component in the listed models.

Specifications and technical data

• SKU: 7638363
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7638363
• Substitutable numbers: 24007638363, 7638363, 24007636218, 24009487561 24008684776, 24008638283 24008486832 24008681107, 24008632475 24008618877, 7636218 9487561, 8684776 8638283 8486832, 8681107 8632475 8618877, 24008627132, 8627132
• Gearbox type: Automatic
• Category: Automatic Transmission

Technical specifications and intended use

The presented gearbox belongs to the Automatic gearboxes category and is designed to work with the drivetrains of BMW F10, F20, and F30 series in petrol versions. The applied type of automatic transmission provides:

• precise, multi-stage gear ratios matched to the characteristics of BMW engines,
• stable power transmission during daily use and dynamic driving,
• optimized cooperation with the vehicle's factory control software.

By maintaining the original architecture of the drivetrain, installing the gearbox in place of a worn-out component allows for restoring the proper operation of the drive without the need for structural modifications to the vehicle.

Benefits of using the GA8HP45Z automatic gearbox

The automatic transmission in the BMW F10, F20, and F30 provides the driver with significantly higher comfort compared to manual solutions. Key advantages include:

• smooth and fast gear shifts, reducing jerking and improving perceived dynamics,
• better utilization of the engine's RPM range, which promotes economical driving,
• increased convenience in urban traffic, in traffic jams, and during maneuvering,
• consistent cooperation with driver assistance systems (e.g., driving modes, stabilization systems).

For the user, this means more predictable vehicle behavior, less driver fatigue, and the ability to more fully utilize the potential of the power unit.

Professional selection and compatibility

The GA8HP45Z automatic gearbox is structurally matched to the BMW F10 520i, F20 125i, and F30 328i platforms, which facilitates the replacement process in a specialized service center. Proper selection of the transmission for a specific engine version and vehicle year is crucial for:

• correct communication with the vehicle's electronics,
• maintaining factory drivetrain performance parameters,
• reducing the risk of errors and malfunctions after installation.

The item has an assigned OEM part number and a set of interchangeable numbers, which facilitates verification of compatibility with a specific car in service catalogs and parts selection systems.

Condition, origin, and service application

The offered gearbox comes from dismantling and is a used component, which allows for a significant reduction in repair costs compared to purchasing a new unit. This type of solution is often chosen by workshops specializing in the BMW brand when it is necessary to:

• replace a damaged transmission after a mechanical failure or overheating,
• perform a comprehensive renovation of the drivetrain in cars with higher mileage,
• restore the vehicle's functionality after a collision or total loss in another area.

A properly selected, used automatic gearbox allows for a favorable compromise between repair costs and the functionality and durability of the drivetrain.

Technical support and additional materials

If you are planning a comprehensive repair or upgrade of the drivetrain area in your BMW and need other components from the same group, such as a torque converter, control elements, or additional transmission components, check the available parts in the BMW automatic gearboxes category.

Before purchasing a used transmission, it is worth familiarizing yourself with practical tips regarding common faults and how to verify the technical condition. A detailed discussion of the differences between manual, automatic, and DSG gearboxes, as well as a guide to making an informed choice, can be found in the article: Gearbox: manual, automatic, or DSG – common faults and a guide to buying a used gearbox.