BMW E90 E91 E92 325d M57N2 Rear Differential Diff 2,79 Ratio WARRANTY

BMW E90 E91 E92 325d M57N2 Rear Differential Diff 2,79 Ratio WARRANTY is an original, used rear differential designed for 3 Series models equipped with the M57N2 engine. This is a solution for drivers and workshops that require a factory-fitted drivetrain component, ensuring stable rear axle operation and predictable vehicle handling. By maintaining the correct gear ratio, the differential allows for driving characteristics consistent with the manufacturer's specifications.

Specifications and technical data

• SKU: 7566195
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7566195
• Substitutable numbers: 33107592324, 7592324, 33107566196, 7566196, 33107566195, 7566195, 33107592323, 7592323
• Location on the vehicle: Rear
• Category: Additional Differential Parts

Purpose and function in the drivetrain

The presented rear differential is designed to work with the rear-wheel drive system in BMW 3 Series E90, E91, and E92 generations with the M57N2 unit. It is responsible for torque distribution between the rear wheels, allowing for speed differentiation during cornering while transferring the high torque characteristic of the 325d engine. A properly selected gear ratio translates into predictable acceleration, comfortable highway driving, and stable vehicle behavior at higher speeds.

Benefits of using an original differential

Using an original differential in a BMW with an M57N2 engine allows for maintaining the factory parameters of the drivetrain. Key advantages include:

• Full structural compatibility with the rear axle and mounting points in the E90/E91/E92 chassis.
• Correct gear ratio, matched to the characteristics of the 325d engine and the factory gearbox.
• Stable load transfer during daily use and dynamic driving.
• Reduced risk of malfunctions in electronic systems related to the drivetrain due to maintaining the original specification.

For workshops, this means easier installation without the need for modifications, and for the user – predictable car behavior after repair or component replacement.

Vehicle placement and installation aspects

The differential is intended for installation on the rear axle of the vehicle, in the standard location provided by the manufacturer. The housing design and mounting points are adapted to factory brackets and control arms, which facilitates the mechanic's work and shortens service time. Proper alignment of the differential relative to the driveshaft and half-shafts is crucial to avoid vibrations, noise, and excessive wear of mating components.

Characteristics of the used product

The offered differential is an aftermarket component, which provides a cost-effective solution while maintaining original BMW specifications. This type of part is particularly attractive to users who want to restore the efficiency of the drivetrain without investing in new components, while maintaining factory fitment and geometry. In the case of differentials, this is significant for both durability and the overall refinement of the drivetrain.

Part selection by numbers and purchase safety

The differential should be selected based on the OEM part number and available interchangeable numbers, which helps avoid errors during ordering and installation. Verifying compatibility with the specific version of the BMW 3 Series (body style, drivetrain type, M57N2 engine) is crucial for the proper operation of the system. To better understand how to safely purchase used drivetrain and brake components, it is worth reading the guide: Brake calipers under the microscope: How to effectively reduce repair costs by choosing verified recycled parts, which discusses best practices when choosing original recycled parts.

If you want to further organize the purchasing process and learn practical tips regarding the verification of numbers, photos, and descriptions, the following guide will also be helpful: Safe purchase of used car parts online – a step-by-step guide, prepared for drivers and professional service centers.

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 additional differentials, housings, or mounts, check out the available parts in the category Other BMW differential parts.