BMW F20 F30 118d 318d N47N Automatic Gearbox 8623594 8638272 GA8HP45 WARRANTY

Listing details

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

BMW F20 F30 118d 318d N47N Automatic Gearbox is a factory-original automatic transmission designed for BMW diesel models, ensuring smooth gear shifts and stable drivetrain operation. Thanks to its design tailored for diesel units and precise control, the gearbox supports both comfortable and dynamic driving. This is a solution for users who expect proven, original technology and want to restore full functionality to their BMW's drivetrain.

Specifications and technical data

• SKU: 8623594
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8623594
• Substitutable numbers: 24008623594, 8623594, 24008638272, 24008614196, 8638272, 8614196
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: Automatic Transmission

Technical characteristics and purpose

The presented gearbox belongs to the Automatic gearboxes category and has been designed to work with diesel engines in BMW F-series models, such as the 118d and 318d with the N47N unit. Automatic transmission control allows for comfortable use in city traffic and on the highway, reducing jerking and ensuring predictable drivetrain reactions. The applied automatic transmission technology is optimized for the torque characteristics of diesel engines, which translates into stable acceleration and efficient power utilization.

Benefits of using the GA8HP45 automatic gearbox

Choosing this gearbox is primarily an investment in consistent drivetrain performance and improved driving comfort. Automatic gear control reduces the load transferred to other drivetrain components, which promotes smooth engine and transmission operation. For the user, this means:

• smooth acceleration without the need for manual gear shifting,
• better traction control in varied road conditions,
• reduced risk of errors resulting from incorrect gear changes,
• more predictable vehicle behavior during overtaking and starting maneuvers.

Thanks to its fitment for the specific generation of the BMW F-series, the GA8HP45 gearbox works with the vehicle's factory control systems, which facilitates integration with the car's electronics and maintains original performance parameters.

Condition, fitment, and installation aspects

The offered gearbox comes from the used components segment, which allows for reduced repair costs while maintaining the original BMW design. Before installation, a standard workshop procedure is recommended, including checking for leaks, verifying mounting points, and preparing the transmission oil cooling system according to the vehicle manufacturer's recommendations. Proper fitment for a specific vehicle should always be confirmed based on the OEM part number and interchangeable numbers available in the technical specification.

To ensure proper transmission operation, it is also essential to use the correct transmission oil and perform a gearbox adaptation in the vehicle's ECU, if required by BMW service procedures. This approach minimizes the risk of improper gear operation and extends the service life of the entire system.

Application in diesel vehicles

The gearbox has been configured to work with Diesel power units, which is important for both gear shifting characteristics and the loads carried by the transmission. In practice, this means better adaptation to the high torque available at low RPM, typical for BMW diesel engines. Proper tuning of the transmission with the engine affects:

• stable starting without excessive slippage,
• efficient use of torque at low RPM,
• maintaining optimal gear ratios during highway driving,
• reduced fuel consumption compared to an incorrectly matched transmission.

As a result, the GA8HP45 gearbox is a cohesive element of the drivetrain in BMW F20 and F30 diesel models, allowing the vehicle to maintain its factory driving characteristics.

Selection support and additional materials

When choosing the right automatic transmission for a specific BMW model, it is worth using practical tips on purchasing used gearboxes. Detailed information about common faults, differences between manual, automatic, and DSG gearboxes, and what to look for when buying can be found in the article Gearbox: manual, automatic, or DSG – common faults and a guide to buying a used gearbox.

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 a torque converter, control elements, or additional transmission components, check the available parts in the BMW Automatic gearboxes category.