Automatic Gearbox BMW F30 F31 F32 F34 320i 420i Petrol N20 GA8HP45Z 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 F30 F31 F32 F34 320i 420i Petrol N20 GA8HP45Z WARRANTY is an advanced automatic transmission from the Automatic gearboxes segment, designed for 3 Series petrol units with the N20 engine. This OEM solution ensures precise drivetrain operation, smooth gear shifts, and stable torque transfer during daily use.

Specifications and technical data

• SKU: 9487562
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8632479
• Substitutable numbers: 24009487562, 9487562, 24008632479, 24008684782, 24008618881, 24008681111, 24008486834, 24008638287, 8632479, 8684782, 8618881, 8681111, 8486834, 8638287
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: Automatic Transmission

Technical characteristics and intended use

The presented gearbox belongs to the BMW automatic gearboxes group and has been designed to work with the N20 petrol engine in BMW F30 and F31 320i models. The automatic design ensures comfortable gear changes without the need for driver intervention, which translates into convenience in city traffic and stable vehicle behavior at higher speeds.

The GA8HP45Z transmission is valued for its efficient cooperation with the engine control system, optimized gear ratios, and effective utilization of the petrol unit's potential. As a result, the drivetrain maintains good dynamics while keeping fuel consumption reasonable under typical road conditions.

Benefits of using the GA8HP45Z gearbox

Using this gearbox in a BMW F30/F31 320i N20 allows for restoring proper drivetrain operation in the event of a failure or wear of the previous transmission. Key advantages include:

• smooth, predictable gear shifts across the full RPM range,
• consistent cooperation with the N20 petrol engine,
• preservation of the factory vehicle handling characteristics,
• possibility of direct installation in place of the original gearbox of this type.

By maintaining the original design concept of the drivetrain, replacing it with this transmission allows you to avoid compromises in terms of ride comfort, throttle response, and the operation of driver assistance systems.

Condition, selection, and compatibility

The offered gearbox comes from the used OEM components segment, which means it is a part sourced from dismantling, intended for further use after proper installation and service maintenance. Before purchasing, it is recommended to verify compatibility with the specific vehicle configuration, particularly regarding the engine version, model year, and the control system used.

To select the appropriate transmission, it is worth using the OEM part number or interchangeable numbers and vehicle data (model, generation, engine type). This helps avoid mechanical and electronic compatibility issues and ensures proper cooperation with the existing wiring harness and control software.

Why consider a used automatic gearbox

In the case of advanced components such as automatic transmissions for BMW, purchasing a used sub-assembly often represents a reasonable compromise between cost and functionality. A properly selected gearbox can significantly reduce repair costs compared to a brand-new component while maintaining correct operating parameters.

If you want to better understand the differences between new and used drivetrain components, selection procedures by OEM number, and real cost proportions, it is worth reading our expert guide: Why it is worth buying used gearboxes and engines – facts instead of myths.

Expanding your BMW drivetrain upgrade

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 torque converters, control elements, or other automatic transmissions, check out the available parts in the BMW automatic gearboxes category.

Additionally, when planning broader service work on your car, a practical guide describing the most frequently replaced consumables and ways to optimize vehicle maintenance costs may be helpful: TOP 10 most frequently replaced parts in your car.