Automatic Gearbox BMW F30 F31 320i Petrol N20 GA8HP45Z 7638365 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 320i Petrol N20 GA8HP45Z is a factory-original automatic transmission designed for 3 Series models equipped with the N20 petrol engine. It offers smooth, comfortable gear shifts and stable operation with the drivetrain, resulting in predictable vehicle behavior during daily use. This is the ideal solution for users looking for a proven automatic gearbox structurally matched to their BMW.

Specifications and technical data

• SKU: 7642301
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7642301
• Substitutable numbers: 7642301, 24007642301, 7638365, 24007638365, 7643726, 24007643726, 082WAO
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: Automatic Transmission

Purpose and compatibility

The presented gearbox belongs to the Automatic Gearbox BMW F30 F31 320i Petrol N20 GA8HP45Z category and has been designed to work with the N20 petrol unit in F30 and F31 320i models. The transmission design is optimized for the torque characteristics of this engine, ensuring the drivetrain maintains factory performance parameters, while throttle response remains predictable and consistent with the manufacturer's specifications.

The automatic nature of the transmission ensures convenient operation in city traffic and stable performance at higher speeds. The applied design solutions allow for efficient power transfer while maintaining the refinement typical of this generation of the BMW 3 Series.

Technical and functional characteristics

The gearbox has been developed as a fully automatic transmission, integrated with the vehicle's control system. The gear-shifting logic is tailored to the petrol engine, which promotes smooth acceleration and maintains optimal RPM in typical road conditions.

In practice, this means:

• smooth gear shifting without sudden jerks,
• stable behavior during dynamic acceleration,
• comfortable operation in both city and highway driving modes,
• preservation of the factory driving characteristics of the BMW 3 Series.

The transmission is structurally prepared to work with the vehicle's electronic system, which facilitates integration with the existing installation and allows for the retention of all manufacturer-intended functions.

Condition, origin, and benefits of choosing a used gearbox

The offered gearbox comes from the BMW used parts segment, which allows for significant repair cost savings compared to purchasing a new component. The factory geometry and fitment for the F30/F31 body are preserved, ensuring that installation is predictable for the workshop and the risk of compatibility issues is minimized.

Choosing a used automatic gearbox is a solution frequently used in professional service centers, especially for post-accident repairs or in the event of an existing transmission failure. It allows for the restoration of full drivetrain functionality within a reasonable budget, while maintaining the original manufacturer's specifications.

If you want to better understand how to safely select used drivetrain components, what the typical verification procedures are, and what the real savings look like, it is worth reading our expert guide: Why it is worth buying used gearboxes and engines – facts instead of myths.

Selection by numbers and vehicle integration

This automatic gearbox has a dedicated OEM number and associated interchangeable numbers, which facilitates precise matching to a specific BMW 3 Series configuration. Before purchasing, it is recommended to verify compatibility by part number or vehicle VIN to ensure full compatibility with the existing control system and equipment.

Thanks to the preservation of the original manufacturer's specifications, the transmission can be integrated into the drivetrain without the need for structural modifications. This is important both from the point of view of durability and subsequent service maintenance.

BMW Drivetrain Expansion – Automatic Gearboxes

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 out the available parts in the BMW Automatic Gearboxes category.