BMW F20 F21 F30 F31 LCI 118i 318i B38 Automatic Gearbox 8673727 9426265 WARRANTY

BMW F20 F30 118i 318i B38 Automatic Transmission is an original automatic gearbox designed for BMW 1 Series F20 and 3 Series F30 models with the B38 engine. This used OEM component ensures a factory fit to the drivetrain, maintaining the performance characteristics intended by the manufacturer. It's a solution for users who want to restore drivetrain functionality while preserving the original BMW specification and compatibility with the vehicle's electronics.

Specifications and technical data

• SKU: 8673727
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8673727
• Substitutable numbers: 24009426265, 9426265, 24008486689, 24007544897, 24008678658, 24008673727, 24008652604, 24008693339, 24008665281, 24008662689, 24008645195, 8486689, 7544897, 8678658, 8673727, 8652604, 8693339, 8665281, 8662689, 8645195
• Gearbox type: Automatic
• Category: Other Transmission & Drivetrain

Application and Compatibility with BMW F20 / F30

The presented automatic transmission is designed to work with the B38 engine in BMW 1 Series F20 118i and 3 Series F30 318i models. This means maintaining the correct gear ratios, shifting logic, and integration with the vehicle's factory systems, such as the engine control unit, safety systems, and driver assistance systems. As a result, the gearbox is a direct replacement for the factory component, requiring no structural modifications.

Automatic Transmission Characteristics

The automatic transmission in this BMW model has been developed for smooth, predictable operation in daily use. The type of gearbox used provides:

• automatic gear changes adapted to the driver's style,
• comfortable starting and acceleration in city traffic,
• stable RPM maintenance during highway driving,
• seamless cooperation with traction and stability control systems.

Thanks to its factory design, the gearbox maintains the parameters intended for the B38 engine, which translates to predictable drivetrain responses and consistent operation of the entire BMW powertrain.

Condition, Origin, and Benefits of Using a Used Part

The offered gearbox is a used part from a dismantled vehicle, which significantly reduces repair costs compared to a new OEM component. At the same time, it retains the original manufacturer's design, minimizing the risk of fitting or electronic communication issues. Choosing this solution is particularly beneficial for daily-driven cars where cost-effective servicing while maintaining factory technology is a priority.

Installation Aspects and Vehicle Integration

The automatic transmission for BMW F20 118i and F30 318i with the B38 engine is structurally prepared for installation at factory mounting points. This facilitates workshop work and reduces vehicle downtime. After correct installation and adaptation according to BMW procedures, the gearbox integrates with the existing electrical system, gearbox cooling system, and control unit software. For the user, this means maintaining the manufacturer-intended driving experience without the need for modifications to wiring harnesses or bodywork mechanical components.

"Other Parts" Category – Selecting Additional BMW Components

If you are also looking for other components in the Other BMW Parts category, it's worth checking the dedicated offer, which includes various components to complement repairs and upgrades for this brand's vehicles: Other BMW Parts.

Technical Knowledge and Drivetrain Development

For those interested in the broader context of modern drivetrain development, including a comparison of sports versions to standard variants, an article discussing the differences in engine, brake, and chassis construction in the premium segment may be helpful: Audi RS vs. Other Models – What Lies Under the Hood and Chassis?. This allows for a better understanding of how manufacturers design contemporary drivetrains and the importance of selecting appropriate components.

If you are interested in the topic of using used components when refreshing older premium segment cars, it is also worth reading a guide describing practical scenarios for upgrades and repairs: The Second Life of a Youngtimer – How Used Car Parts Revitalize Cars from 1998–2012. This is a good supplement to your knowledge when planning comprehensive service work on a BMW.