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

BMW E90 E91 E92 325d M57N2 Rear Differential Diff 2,79 Ratio RECONDITIONED is a professionally reconditioned, precision-engineered drivetrain component designed for rear axle installation. By maintaining the correct 2.79 gear ratio and undergoing meticulous processing, this reconditioned differential ensures stable torque transfer and predictable vehicle handling during both daily and dynamic driving.

Specifications and technical data

• SKU: 7566195-1
• Mark: BMW (Genuine OE)
• OEM Part Number: 7566195
• Substitutable numbers: 33107592324, 7592324, 33107566196, 7566196, 33107566195, 7566195, 33107592323, 7592323
• Location on the vehicle: Rear
• Category: Differentials

Purpose and technical specifications

The presented component belongs to the Differentials category and is dedicated to BMW 3 Series E90, E91, and E92 models equipped with the 325d M57N2 engine. The differential design with a 2.79 gear ratio is engineered to provide balanced acceleration and comfortable engine RPM at highway speeds, resulting in smoother engine operation and predictable driving characteristics.

The installation position is the rear axle; therefore, the component works directly with the driveshaft and half-shafts, responsible for distributing power to the rear wheels. A properly selected gear ratio has a significant impact on the perceived dynamics, flexibility, and overall refinement of the entire drivetrain.

Reconditioning and preparation for installation

The differential has undergone a professional reconditioning process, including a detailed inspection of the housing, rolling elements, and mating surfaces. The goal of this process is to restore correct operating clearances, proper gear meshing, and optimal performance under load, which is crucial for the durability and refinement of the final drive unit.

The reconditioned differential is prepared for installation as a complete rear unit, facilitating replacement in a workshop environment. Using the correct 2.79 gear ratio allows for maintaining the factory drivetrain characteristics in the BMW 325d M57N2 without the need for modifications to the engine or transmission control systems.

Benefits of using a 2.79 gear ratio differential

Using a 2.79 gear ratio differential in the BMW 325d M57N2 provides a range of practical benefits:

• a balanced combination of acceleration and fuel economy,
• lower engine RPM at higher speeds compared to shorter gear ratios,
• stable vehicle behavior during long-distance highway driving,
• consistency with the factory drivetrain configuration.

For the user, this means predictable vehicle reactions, no unwanted changes in driving characteristics, and the ability to operate the vehicle without issues after replacing a worn-out differential with a reconditioned equivalent.

Fitment, reference numbers, and compatibility

The component is a genuine BMW part, which facilitates selection based on the specific body style and engine version. The differential has an assigned OEM part number and associated interchangeable numbers, allowing you to precisely verify compatibility with your vehicle using manufacturer catalogs or specialized databases.

If you have any doubts regarding the selection of the gear ratio or the complete final drive unit, it is worth using the practical tips found in the article Dismantled final drives and differentials – how to choose gear ratios for your driving style, which discusses differences in gear ratios, their impact on driving characteristics, and examples of configurations used in various models.

Support in selection 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 rear axles, final drives, or other complete differentials, check out the available parts in the BMW Differentials category.

When making a decision about choosing a reconditioned component, a guide comparing different types of parts, which discusses quality and cost aspects, may also be helpful – you can find more information in the material New or used? A comparison of costs and quality of car parts. This will make it easier for you to assess when a reconditioned differential will be the optimal solution for your BMW 3 Series.