BMW G20 G21 G22 G23 B48 Automatic Gearbox GA8HP51Z 9487333 WARRANTY

Listing details

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

BMW G20 G21 G22 G23 B48 Automatic Gearbox GA8HP51Z is an advanced automatic transmission from the Automatic transmissions family, designed for modern BMW models with the B48 petrol engine. The design of this gearbox ensures smooth gear shifting, comfortable drivetrain operation, and stable torque transfer during daily use.

Specifications and technical data

• SKU: 5B3DCC5
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 5B3DCC5
• Substitutable numbers: 24005B3DCC5, 24009487333, 5B3DCC5, 9487333
• Fuel type: Petrol
• Gearbox type: Automatic
• Part type: Automatic Transmission
• Category: Automatic Transmission

Purpose and compatibility

The presented automatic gearbox has been designed to work with the B48 petrol unit in BMW G20, G21, G22, and G23 series models. Using this transmission allows for maintaining the factory drive characteristics, correct shift points, and compatibility with the vehicle's control systems.

Thanks to the design typical of modern BMW automatics, the gearbox is prepared to handle various driving modes, which translates into flexibility in city traffic and on the road. Using an original unit from the same model family reduces the risk of fitment issues and facilitates integration with the vehicle's electronics.

Construction and operating characteristics

The GA8HP51Z automatic transmission belongs to the group of multi-stage torque converter gearboxes that combine comfort with good dynamics. The applied gear ratio layout allows for maintaining optimal petrol engine RPM, which promotes smooth operation and reduces noise in the cabin.

In practice, this means:

• smooth, sequential gear shifting without jerking,
• efficient acceleration when overtaking,
• stable drive behavior at constant speeds,
• effective utilization of the B48 engine's characteristics.

The automatic operating mode allows the driver to focus on driving, while the gearbox control system selects gears based on load, driving style, and road conditions. This solution is particularly beneficial in city traffic and during longer journeys.

Application in petrol vehicles

The gearbox is intended for use with a petrol-powered drivetrain, which is significant for gear ratios and controller calibration. As a result, throttle response, shift timing, and downshifting behavior are matched to the specifics of the petrol engine, ensuring predictable and comfortable vehicle handling.

Proper selection of the transmission for the fuel type is crucial for the durability of the entire drivetrain. Using a gearbox from the same design family as the factory-installed one helps maintain consistency in operating parameters and reduces the risk of improper interaction with the engine electronics.

Condition, verification, and benefits of installation

The offered gearbox comes from professional dismantling and is a used component, which represents a reasonable compromise between cost and functionality. This type of solution allows for significantly reducing expenses related to drivetrain repair while maintaining the manufacturer's original specifications.

Choosing an original, used BMW automatic gearbox brings a number of practical benefits:

• preservation of factory drive operating characteristics,
• better compatibility with the vehicle's control software,
• reduced risk of installation problems compared to aftermarket replacements,
• possibility of economical repair while maintaining a high-quality component.

BMW automatic transmissions – expansion and modernization

If you are planning a comprehensive repair or modernization 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 sub-assemblies, check the available parts in the BMW automatic transmissions category.

How to safely buy a used automatic gearbox

When choosing a used gearbox, it is worth paying attention to compatibility with the vehicle model, engine type, and transmission type. It is also important that the installation is carried out by a workshop experienced with BMW automatic transmissions, which minimizes the risk of installation errors and operational problems.

If you want to better understand the differences between manual, automatic, and DSG gearboxes, learn about typical faults, and key aspects of buying a used transmission, read the guide: Gearbox: manual, automatic, or DSG – typical faults and a guide to buying a used transmission.