Automatic Gearbox BMW X3 F25 X4 F26 20dX Diesel B47 8638291 GA8HP45X 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 X3 F25 X4 F26 20dX Diesel B47 is a factory-original automatic transmission designed for diesel units, engineered for precise integration with the xDrive system. Thanks to its Automatic design, it ensures smooth gear shifts, stable acceleration, and comfortable drivetrain operation in daily use.

Specifications and technical data

• SKU: 8486836
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8486836
• Substitutable numbers: 8486836, 24008486836, 8684786, 24008684786, 8681116, 24008681116, 8638291, 24008638291, 8624216, 24008624216, 8678747, 24008678747
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: Automatic Transmission

Purpose and compatibility

The offered gearbox belongs to the Automatic transmissions BMW group and is dedicated to X3 F25 and X4 F26 models with the 20dX B47 diesel engine. Using a transmission from the GA8HP45X family allows for maintaining the factory drivetrain performance characteristics, correct shift points, and compatibility with the vehicle's control software.

The automatic design of the transmission has been developed for seamless cooperation with the all-wheel-drive system, which translates into predictable vehicle behavior both in city traffic and during highway driving. Using an original BMW solution minimizes the risk of mechanical and electronic compatibility issues.

Technical and functional characteristics

The Automatic type gearbox provides sequential, electronically controlled gear shifts, optimized for diesel engines. Tuning it with a Diesel unit allows for effective use of torque at low and medium RPMs, which improves the dynamics and refinement of the drivetrain.

The GA8HP45X transmission has been designed for:

• stable handling of loads characteristic of diesel engines,
• smooth gear shifting without jerking,
• maintaining optimal engine RPM across a wide speed range,
• cooperation with factory traction control and stability systems.

As a result, installing this gearbox in a BMW X3 F25 or X4 F26 allows for maintaining predictable, factory-consistent vehicle behavior without the need for structural modifications.

Condition, origin, and benefits of choosing a used gearbox

The offered BMW automatic gearbox comes from the used parts segment, which allows for significantly reducing repair costs compared to purchasing a new component or a full remanufacturing. Choosing an original, used transmission is often a sensible compromise between price and maintaining factory performance parameters.

Before installation, standard workshop procedures are recommended: verifying seals, checking the condition of connectors, and replacing the oil and filter in accordance with the vehicle manufacturer's recommendations. This approach increases the durability of the system and reduces the risk of improper operation after installation.

If you are considering whether choosing a used transmission is the right solution for your car, it is worth reading a guide describing the profitability of such an investment and key aspects to check before purchasing: Used gearbox – when is it worth it and what you need to remember.

Why choose an original BMW automatic gearbox

Using an original gearbox from the Automatic transmissions BMW group in X3 F25 and X4 F26 models ensures:

• preservation of factory driving and acceleration characteristics,
• consistency with engine and xDrive control software,
• proper matching to the parameters of the Diesel B47 unit,
• easier diagnostics during future service inspections.

For workshops and users, this means a lower risk of adaptation problems, shorter installation time, and predictable vehicle behavior after the transmission replacement.

Expanding repairs within the drivetrain

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 the available parts in the BMW automatic transmissions category.