Automatic Gearbox BMW F30 F31 F34 320i Petrol N20 GA8HP45Z 8614208 WARRANTY

Listing details

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

Automatic Gearbox BMW F30 F31 F34 320i Petrol N20 GA8HP45Z is a factory-fitted automatic transmission designed for the petrol engine unit, engineered for smooth, precise, and comfortable gear shifts. A used gearbox from this series is a solution for drivers who want to restore the full efficiency of the drivetrain while maintaining the original operating characteristics and proper alignment with the engine control system. Thanks to its automatic design, it ensures calm, predictable operation in daily use and adequate dynamics under higher loads.

Specifications and technical data

• SKU: 8614208
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8614208
• Substitutable numbers: 24008614208, 8614208
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: Automatic Transmission

Purpose and technical characteristics

The presented gearbox belongs to the Automatic gearboxes group and is dedicated to the petrol drivetrain in BMW 3 Series F30/F31 models with the N20 engine in the 320i version. The automatic design of the transmission has been developed to work with electronic control systems, which allows for precise adjustment of gear ratios to engine load, driving style, and road conditions.

In practice, this means stable starting, smooth acceleration, and reduced jerking during gear changes, which is particularly important in daily city driving and on highways. The gearbox designed for the petrol unit ensures the appropriate gear ratio characteristics for an engine with high operating culture and a wide range of usable RPM.

Benefits of using an original BMW automatic gearbox

Using an original automatic gearbox in the BMW F30/F31 320i N20 allows for maintaining the consistency of the entire drivetrain. Key advantages of this solution include:

• maintaining factory gear-shifting logic, consistent with the engine and gearbox control unit software,
• proper matching to the torque of the petrol unit,
• compatibility with factory driving modes (comfort, dynamic driving, economy – depending on the car's configuration),
• reducing the risk of communication issues between control modules.

As a result, the driver receives predictable vehicle behavior, and the drivetrain operates under conditions close to factory specifications. A used transmission of this type is often chosen as an economical alternative to costly regeneration or purchasing a new unit, while maintaining the original specification.

Drivetrain application and driving comfort

The automatic gearbox in the BMW 320i N20 is responsible not only for torque transmission but also for noticeable driving comfort. Properly selected gear ratios allow the engine to be kept in the optimal RPM range, which translates into:

• efficient acceleration without excessive gear dragging,
• reduction of noise and vibration at constant speeds,
• more stable vehicle behavior during overtaking maneuvers,
• better utilization of the petrol unit's characteristics.

For the user, this means more comfortable, predictable operation, especially in city traffic and traffic jams, where the automatic gearbox significantly relieves the driver.

Condition, selection, and compatibility verification

The offered transmission is a used component, which allows for reducing repair costs while maintaining the original BMW design. Before installation, a standard service procedure is recommended, including, among others, checking for leaks, changing the oil according to the manufacturer's recommendations, and adapting the gearbox in the vehicle using appropriate diagnostic software.

To correctly select the gearbox for a specific vehicle, it is worth paying attention to:

• compatibility with the N20 engine in the 320i version,
• type of drivetrain used in the vehicle,
• control unit software version and equipment configuration.

In case of doubts regarding the selection of the transmission, it is helpful to compare the vehicle's identification data and consult with a service center specializing in the BMW brand.

Substantive support and additional resources

For users who want to better understand the differences between individual types of transmissions and approach the purchase of a used component consciously, a detailed guide has been prepared. Practical information regarding typical signs of wear, methods of verifying the condition, and purchasing tips can be found in the article Gearbox: manual, automatic, or DSG – typical 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 components from the same group, such as a converter, control elements, or additional transmission sub-assemblies, check the available parts in the BMW automatic gearboxes category.