Automatic Gearbox BMW F30 F31 F34 320i 420i Petrol N20 8601701 GA8HP45Z WARRANTY

Listing details

The differential is sold with a 90-day warranty! It was tested before removal and is in full working order.

Automatic Gearbox BMW F30 F31 F34 320i 420i Petrol N20 GA8HP45Z is an original, used transmission from the Automatic gearboxes segment, designed for BMW petrol cars with the N20 engine. It provides a solid foundation for professional drivetrain repair, ensuring proper structural fit and operating parameters in accordance with the manufacturer's specifications.

Specifications and technical data

• SKU: 8601701
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8601701
• Substitutable numbers: 8601701, 24008601701
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: Automatic Transmission

Purpose and compatibility

The presented automatic gearbox is dedicated to BMW 3 Series F30, F31, F34 320i and 4 Series 420i models with the N20 petrol unit. The transmission design has been developed to work with the drivetrain of these versions, which translates into correct gear ratios, proper control operation, and predictable vehicle behavior across the full range of loads.

Thanks to the use of a factory BMW solution, consistency with the original control software, gear shifting logic, and engine performance characteristics is maintained. This is particularly important for vehicles equipped with advanced traction and stability control systems that interact with the automatic gearbox.

Technical characteristics of the automatic transmission

The Automatic Gearbox BMW F30 F31 F34 320i 420i Petrol N20 GA8HP45Z belongs to modern torque converter transmissions, designed for smooth gear shifting and efficient use of the petrol engine's torque. The applied design allows for:

• precise gear selection in automatic mode,
• stable operation across a wide range of rotational speeds,
• efficient cooperation with the N20 engine control system.

This solution allows for comfortable driving in city traffic and predictable behavior during dynamic acceleration. Automatic gear shifting reduces mechanical loads resulting from driver error, which, with proper maintenance, promotes a longer service life of the entire drivetrain.

Benefits of using an original BMW automatic gearbox

Using an original transmission from the BMW Automatic gearboxes group provides a number of practical service and utility benefits:

• preservation of factory gear shifting characteristics,
• proper cooperation with the existing wiring harness and controller,
• reduced risk of software compatibility issues,
• easier diagnostics in the future due to compliance with factory service procedures.

For workshops and users, this means a predictable installation process and the ability to use standard adaptation and testing procedures after the gearbox replacement.

Condition, origin, and practical application

The offered gearbox is a used item, which in practice allows for a significant reduction in repair costs compared to purchasing a new unit, while maintaining the original BMW design. This type of solution is often chosen by professional workshops specializing in the brand, where both the economy of the repair and compliance with factory solutions are important.

Before installation, standard service activities typical for automatic transmissions are recommended, such as checking for leaks and changing the oil and filter in accordance with the procedure adopted by the given workshop. This allows the gearbox to be prepared for further operation in a vehicle with a petrol engine, minimizing the risk of improper operation after installation.

Selection by VIN and additional technical materials

Due to the specifics of BMW automatic transmissions, it is worth verifying the compatibility of the gearbox with a specific vehicle before purchase, preferably based on the VIN and OEM part number. This facilitates correct selection and reduces the risk of version mismatch, especially in the case of differences resulting from the production year or equipment configuration.

For users and workshops who want to deepen their knowledge about the cost-effectiveness of installing aftermarket components, an expert guide will be useful: Why it is worth buying used gearboxes and engines – facts instead of myths. The article discusses, among other things, selection procedures by VIN/OEM, common myths about used components, and cost ratios compared to new parts.

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 converter, control elements, or additional mounting components, check the available parts in the BMW automatic gearboxes category.