BMW F10 F20 F30 F31 Transfer Box Transmission Chain Wheel Flange 8643150 6208C3

BMW F10 F20 F30 F31 Transfer Box Transmission Chain Wheel Flange is a precision drivetrain component designed for use in the transfer case of BMW F-series models. Thanks to factory-spec gear geometry and precise matching to specific drivetrain configurations, this component ensures stable torque transfer and predictable operation of the entire system. It is a solution for users who expect proven quality and want to restore proper drivetrain performance without unnecessary compromises.

Specifications and technical data

• SKU: 8643150-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8643150
• Substitutable numbers: 27108643150, 8643150, 27107649783, 27107636486, 27107636174, 27107505375, 27108612557, 27107629524, 27108623347, 27107643757, 27107639263, 7649783, 7636486, 7636174, 7505375, 8612557, 7629524, 8623347, 7643757, 7639263, 27608643153, 8643153, 6208C3, 27105A371F3, 1053713, 27107649718, 7649718
• Gearbox type: No information
• Category: Transfer Cases

Purpose and function in the drivetrain

The transfer case gears in BMW F-series vehicles are responsible for distributing power between the vehicle's axles and for smoothly transferring loads under various driving conditions. A properly selected set of gears:

• ensures even power transmission within the transfer case,
• reduces noise and vibrations resulting from gear operation,
• stabilizes drivetrain performance under varying loads and speeds,
• reduces the risk of damage to other transmission components.

In BMW F10, F20, F30, and F31 vehicles, the proper condition of the gears is crucial for maintaining predictable traction and correct interaction between the transfer case and other drivetrain components.

Compatibility and technical parameters

The presented gear set has been designed to operate within the Transfer Cases category in selected BMW F-series models. The component's design is adapted to a specific type of transmission, which allows for maintaining the correct gear ratio characteristics and proper cooperation with the drivetrain control mechanisms.

Original BMW OE origin means maintaining factory manufacturing tolerances, which translates into:

• proper meshing with other gears in the transfer case,
• appropriate operating culture across the full RPM range,
• maintenance of the service life intended by the manufacturer.

An additional advantage is the presence of dedicated replacement numbers, which facilitates verification of compatibility with a specific vehicle configuration and allows for selecting the component exactly for a given drivetrain version.

Characteristics of the used component

The offered gears come from a group of used parts, which represents a reasonable compromise between repair costs and maintaining OEM quality. This type of component, with proper operation and appropriate transfer case maintenance, can still provide stable and repeatable transmission performance. In practice, this means the possibility of restoring the efficiency of the drivetrain without the need to invest in a completely new unit.

Choosing a used OEM component is particularly beneficial in situations where only a part of the transmission has been damaged, while other transfer case components remain in good technical condition. This allows for limiting the scope of the repair to replacing the gear set itself, while maintaining the factory operating characteristics of the entire system.

Why choose BMW transfer case gears

Compared to unreliable aftermarket replacements, original BMW transfer case gears offer a number of practical benefits:

• Factory fitment – maintaining original gear geometry and mounting dimensions.
• Consistency with other transfer case components – no need to modify other sub-assemblies.
• Predictable drivetrain behavior – in line with the vehicle manufacturer's design assumptions.
• Possibility of economical repair – especially in cases of localized transmission damage.

For users considering various drivetrain repair scenarios, a guide material discussing the cost-effectiveness of purchasing used components may be helpful. It is worth reading the article "Used transmission – when is it worth it and what you need to remember", which addresses issues of compatibility, parts selection, and compares regeneration with the purchase of used sub-assemblies.

Expanding repairs within the BMW transfer case

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 housings, shafts, or additional gears, check out the available parts in the BMW Transfer Cases category.