BMW F30 F31 F32 F36 320ix 420ix N20 Automatic Gearbox GA8HP45X 8632473 WARRANTY

Listing details

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

BMW F30 F31 F32 F36 320ix 420ix N20 Automatic Gearbox GA8HP45X is a factory-original, used transmission from the Automatic gearboxes family, designed for BMW models with xDrive and the N20 engine. It offers precise, smooth gear shifts and maintains full structural compatibility with the manufacturer's factory specifications. This is a solution for users who expect a technically matched component without compromising on compatibility.

Specifications and technical data

• SKU: 8638282
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8632473
• Substitutable numbers: 24008638282, 8638282, 24008601720, 24008632473, 24008618876, 8601720, 8632473, 8618876
• Gearbox type: Automatic
• Category: Automatic Transmission

Technical characteristics and purpose

The presented gearbox belongs to the modern family of eight-speed automatic transmissions used in BMW vehicles with all-wheel drive. The design is engineered for efficient torque transfer of the N20 engine in the 320ix and 420ix versions, while maintaining high operating standards and drivetrain stability.

Transmission type: automatic – the gearbox performs gear changes without driver intervention, ensuring a comfortable ride in city traffic and on the highway. The implemented control concept enables fast gear switching, which translates into an efficient response to throttle input and optimal utilization of the N20 engine's characteristics.

Compatibility with BMW F30, F31, F32 320ix and 420ix N20

The gearbox has been developed specifically for the BMW F-series platform with xDrive, which means it is perfectly matched to the body geometry, drivetrain, and factory mounting points. As a result, installation in F30, F31, and F32 models with the N20 unit is straightforward, without the need for any modifications to the vehicle's structure.

Proper selection of the transmission for a specific engine and drivetrain version is crucial for the durability of the entire system. Using a gearbox dedicated to the 320ix and 420ix minimizes the risk of improper operation, controller errors, or premature wear of cooperating components, such as the driveshaft or differential.

Benefits of using an original BMW automatic gearbox

Choosing this transmission primarily ensures the preservation of the factory gear-shifting characteristics intended by the manufacturer for a given engine and drivetrain configuration. Properly selected gear ratios and control logic translate into predictable vehicle behavior, which is important both in daily use and during dynamic driving.

Key advantages include:

• consistency with the factory powertrain control software,
• proper cooperation with the xDrive system,
• maintaining gear-shifting comfort at the level intended by the manufacturer,
• possibility of further diagnostics and service based on standard BMW procedures.

Thanks to this, the gearbox fits well with the needs of users who expect predictable vehicle behavior after a repair or transmission replacement.

Condition, verification, and selection based on technical data

The offered gearbox comes from the segment of used BMW components, which allows for significant repair cost savings compared to purchasing a brand-new transmission. At the same time, structural compatibility with the vehicle's original equipment is maintained, which facilitates installation and subsequent maintenance.

When selecting an automatic gearbox for a specific car, it is crucial to compare technical data, such as the transmission type, engine version, and drivetrain configuration. In practice, this means verifying information in the vehicle documentation and service systems to ensure full compatibility. If in doubt, it is worth seeking assistance from a workshop specializing in the BMW brand or consulting with the seller's technical department.

For users who want to better understand the specifics of the second-hand parts market, selection procedures based on technical data, and real cost differences, the following expert guide will be helpful: Why it is worth buying used gearboxes and engines – facts instead of myths.

BMW automatic gearboxes – expansion and modernization of the 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 torque converter, control elements, or additional transmission sub-assemblies, check the available parts in the BMW automatic gearboxes category.

Additional information on the cost-effectiveness of choosing original, replacement, and used parts, as well as how to consciously approach repair costs, is also provided in the guide: Original, replacement, or used – which car parts are the most cost-effective?.