BMW F80 M3 F82 F83 M4 F87 M2 Rear Differential Diff 3,46 Ratio 2289970 WARRANTY

Listing details

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

BMW F80 M3 F82 F83 M4 F87 M2 Rear Differential Diff 3,46 Ratio is an original BMW drivetrain component designed for rear axle installation in M-series sports models. This used differential allows for maintaining the factory drivetrain characteristics, ensuring consistency with other chassis components.

Specifications and technical data

• SKU: 8090464-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8090464
• Substitutable numbers: 33108090464, 8090464, 33102289970, 2289970
• Location on the vehicle: Rear
• Category: Additional Differential Parts

Purpose and function in the drivetrain

The presented rear differential is the component responsible for torque distribution to the rear wheels, which is crucial for traction, stability, and predictable vehicle behavior during acceleration and cornering. The applied gear ratio allows for maintaining proper dynamics while keeping optimal engine RPMs in higher gears.

The vehicle placement defined as rear means that the differential works directly with the rear half-shafts and the driveshaft, forming a cohesive system with the suspension and traction control systems. This ensures compatibility with the vehicle's factory electronic and mechanical systems.

Benefits of using an original BMW differential

Using an original differential in M3, M4, and M2 models ensures:

• factory fitment for the housing, mounts, and rear suspension geometry,
• consistent operation with the stock transmission and driveshaft,
• preservation of the manufacturer-intended acceleration and rotational speed characteristics,
• proper interaction with electronic stability and traction control systems.

For users who push their cars to the limit – both on the road and on the track – such a component provides a solid foundation for further drivetrain configuration without the need to interfere with the control electronics.

Condition, origin, and installation aspects

The differential comes from dismantling and is offered as a used part, which allows for an economical repair or replacement of the rear differential while maintaining the original manufacturer specifications. This type of solution is particularly beneficial in cases of mechanical damage, bearing noise, or excessive play in the existing differential.

During installation, it is recommended to:

• check the condition of the mounts and bushings in the rear subframe,
• replace the differential oil with fresh fluid according to the manufacturer's recommendations,
• inspect the half-shafts and seals for any potential leaks.

This approach minimizes the risk of future failures and allows you to fully utilize the potential of the installed component.

Selection and compatibility with part numbers

The differential has a dedicated OEM part number and associated interchangeable numbers, which facilitates precise identification in service catalogs and parts selection systems. Before purchasing, it is worth comparing the markings with the currently installed rear differential or verifying them using the vehicle's VIN to ensure full compatibility with the specific equipment and drivetrain version.

This will help you avoid problems with installation, gear ratio differences, or improper interaction with vehicle electronics, ensuring the replacement process is smooth and predictable.

Drivetrain expansion and additional information

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 differentials, differential housings, or accessory final drive components, check out the available parts in the Other BMW differential parts category.

When making a decision about repairing the rear differential, it is also worth considering different service strategies – a guide describing the pros and cons of individual solutions, available in the article Refurbished or used original – which part to choose for repairs?, may be helpful.

For a comparison of solutions used in other premium brands and a better understanding of the evolution of advanced drivetrain systems, you can also read the material Evolution of the Mercedes S-Class: from W140 to W222 – innovations, model differences, and Mercedes auto parts over the years, which shows how manufacturers develop key components across successive generations of their models.