BMW F20 F21 116i 118i N13 Automatic Gearbox GA8HP45Z 7642302 7643664 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 F21 116i 118i N13 Automatic Gearbox GA8HP45Z is an original, used automatic transmission from the ZF family, designed for BMW 1 Series models equipped with the N13 petrol engine. Thanks to its factory OEM design, it ensures precise cooperation with the drivetrain, smooth gear shifting, and maintains the driving characteristics intended by the manufacturer. This is the ideal solution for users who expect a proven, complete automatic transmission rather than a costly rebuild.

Specifications and technical data

• SKU: 7642302
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7642302
• Substitutable numbers: 7642302, 24007642302, 7643664, 24007643664
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: Automatic Transmission

Purpose and compatibility

The presented transmission belongs to the Automatic gearboxes category and has been designed to work with petrol units in BMW F20 and F21 models in 116i and 118i versions with the N13 engine. The GA8HP45Z design is tuned to the torque of these units, which translates into stable operation, proper gear selection, and the maintenance of factory acceleration and fuel consumption parameters.

By using an original automatic transmission, full integration with the factory control software, safety systems, and driving modes is maintained, which minimizes the risk of errors and malfunctions after installation.

Construction and operating characteristics

The GA8HP45Z is a modern, multi-speed automatic transmission that, in combination with the N13 petrol engine, ensures smooth, fast, and predictable gear shifts. The applied hydrodynamic design with a torque converter lock-up enables comfortable starting, and at higher speeds, it reduces slip, which improves drivetrain efficiency.

The transmission is adapted to work with electronic control, comfort and dynamic modes, and driver assistance functions. Properly selected gear ratios allow the engine to be kept in the optimal RPM range, which promotes smooth operation and reduces noise in the cabin.

Benefits of using an original used automatic transmission

Choosing an original, used automatic transmission for a BMW F20/F21 with an N13 engine is a solution that often proves more predictable than rebuilding a heavily worn transmission. The factory OEM design ensures:

• Full installation compatibility with factory mounting points and drivetrain accessories.
• No need for modifications to the electrical installation or control systems.
• Retention of factory gear-shifting characteristics and compatibility with the petrol engine.
• The possibility of restoring vehicle functionality faster compared to a long-term rebuild.

For users considering different repair scenarios, a guide discussing the cost-effectiveness of purchasing original transmissions will be useful. More information can be found in the article Manual transmission failures in cars – why is an original used part a more sensible choice than a rebuild?, which, although it concerns manual transmissions, well illustrates the logic of choosing original drivetrain components.

Additionally, if you want to better understand the advantages of original components over replacements, it is worth reading the guide 5 reasons why a used OEM part is a better choice than a replacement, which practically discusses the criteria for selecting parts.

Condition, verification, and service application

The offered transmission belongs to the group of used BMW automatic transmissions, which means it comes from vehicle dismantling and is intended for further use after proper installation and service maintenance. Such components are frequently chosen by workshops specializing in the BMW brand because they allow for economical repair while maintaining the factory design of the drivetrain.

Before installation, standard service procedures are recommended, such as changing the transmission fluid according to the manufacturer's recommendations and checking the associated accessories, which increases the chance of long-term and stable operation of the entire system.

Expanding repairs within the BMW drivetrain

If you are planning a comprehensive repair or modernization of the drivetrain area in your BMW and need other elements from the same group, such as a converter, control elements, or additional transmission sub-assemblies, check the available parts in the BMW automatic transmissions category.