BMW F22 F23 F30 F31 B38 6 Speed Manual Gearbox GS6-17BG Start Stop WARRANTY

Listing details

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

BMW F22 F23 F30 F31 B38 6 Speed Manual Gearbox GS6-17BG Start Stop WARRANTY is an original, used manual transmission designed for BMW F-series petrol engines equipped with a start-stop system. Thanks to precise gear ratio selection and robust OEM construction, the gearbox ensures consistent handling, predictable drivetrain operation, and proper torque transfer during daily use. This is a solution for users who expect mechanical simplicity, direct drivetrain feel, and compliance with factory BMW specifications.

Specifications and technical data

• SKU: 8637976
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8637976
• Substitutable numbers: 8637976, 23008637976
• Fuel type: Petrol
• Gearbox type: Manual
• Category: Manual Transmission

Purpose and compatibility with the B38 unit

The presented gearbox belongs to the Manual transmissions group and was designed to work with the B38 three-cylinder petrol engine in BMW F-series models (including F22, F23, F30, F31). Using a dedicated transmission for this powertrain allows for maintaining factory acceleration characteristics, flexibility, and fuel consumption, as well as proper interaction with vehicle electronics, including the start-stop function.

As a BMW brand product, the gearbox is structurally matched to original mounts, half-shafts, clutch, and control system, which facilitates installation and reduces the risk of compatibility issues.

Characteristics of the 6-speed manual gearbox operation

This 6-speed manual transmission has been developed for drivers who prefer direct control over gear shifting. The use of six gears allows for:

• precise selection of the gear ratio to the current load of the B38 engine,
• maintaining favorable RPMs during highway driving,
• efficient acceleration in the mid-speed range.

Gearbox type: Manual promotes simplicity of maintenance and reduces the number of potential failure points compared to more complex automatic designs. Integration with the start-stop system allows for automatic engine shutdown and restart when stopped, without disrupting the transmission operation.

Construction for petrol drivetrains

The gearbox has been configured to work with fuel type: Petrol, which means gear ratios are adapted to the torque characteristics of the B38 petrol engine. Thanks to this:

• lower gears ensure dynamic starting and flexibility in city traffic,
• higher gear ratios support economical driving at constant speeds,
• the entire drivetrain maintains parameters close to factory BMW settings.

Proper tuning with the petrol engine reduces unwanted vibrations and improves the overall refinement of the drivetrain, which is particularly important in modern three-cylinder designs.

Condition, origin, and identification

The gearbox comes from dismantling and is marked as Used, which in practice means a real opportunity to optimize repair costs while maintaining original BMW specifications. To facilitate identification in the store system, an SKU designation has been used, and in the technical documentation, the OEM Part Number and associated interchangeable numbers are available, which allows for verifying compatibility with a specific vehicle configuration.

Choosing a used OEM gearbox is particularly beneficial for repairs where consistency with factory software and equipment is key, as well as maintaining predictable drivetrain behavior in the long term.

How to safely select a used gearbox

To minimize the risk of an incorrect purchase, it is worth verifying the transmission's compatibility with the specific B38 engine version, vehicle year, and the start-stop system used before installation. It is helpful to compare gearbox markings, fuel type, and transmission type with vehicle data. Additionally, it is recommended to check the condition of seals, mounting points, and any play on the gearbox input and output shafts.

If you want to better understand the differences between manual, automatic, and DSG transmissions, as well as learn practical tips on buying a used gearbox, check out the article Gearbox: manual, automatic or DSG – common faults and a guide to buying a used gearbox, where you will find concrete examples and answers to the most frequently asked questions.

Expanding the drivetrain in a BMW

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 additional transmissions, compatible gear shifters, or related control elements, check the available parts in the BMW Manual Transmissions category.

Such an approach allows for building a coherent set of drivetrain components based on OEM parts, which translates into stable system operation, predictable vehicle behavior, and easier diagnostics in the future.