BMW E90 E91 E92 325i N52 N52N Rear Differential Diff 3,73 Ratio 7519941 WARRANTY

Listing details

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

BMW E90 E91 E92 325i N52 N52N Rear Differential Diff 3,73 Ratio is a factory drivetrain component from the Differentials category, designed for installation on the rear axle of selected BMW 3 Series E9x models. It is responsible for the precise transfer of torque to the wheels, ensuring stable handling and predictable vehicle behavior during acceleration and cornering. This is a solution for users looking for a proven, original component with a specific 3.73 gear ratio.

Specifications and technical data

• SKU: 7519941
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7519941
• Substitutable numbers: 33107566179, 7566179, 33107519942, 7519942, 33107519941, 7519941, 33107566180, 7566180
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function in the drivetrain

The presented differential is mounted in the rear of the vehicle, where it plays a key role in distributing drive between the wheels of the driven axle. The 3.73 ratio promotes dynamic acceleration, which is particularly noticeable in daily city driving and during flexible acceleration on the road. A well-chosen rear differential affects:

• consistent and predictable car behavior during load changes,
• efficient use of engine power across the entire rev range,
• driving stability at higher speeds.

Compatibility and part identification

The differential comes from the BMW family of components, which means it maintains factory manufacturing and fitment standards. The original OEM part number and associated interchangeable numbers allow for unambiguous verification of compatibility with a specific body style and drivetrain version. This allows you to safely select a rear differential for your E90, E91, or E92, minimizing the risk of installation issues.

It is worth comparing the differential markings with vehicle data or consulting a mechanic before purchase to confirm that the 3.73 ratio is compatible with your current drivetrain configuration and expected performance characteristics.

Performance characteristics and benefits of the 3.73 ratio

A rear differential with a 3.73 ratio is a solution often chosen by drivers who want more responsive throttle behavior. In practice, this means:

• better dynamics when starting and exiting corners,
• more efficient acceleration in the mid-speed range,
• more direct feedback from the drivetrain.

For many BMW 3 Series E9x users, this gear ratio selection represents a reasonable compromise between daily usability and a sportier driving character. BMW E90 E91 E92 325i N52 N52N Rear Differential Diff 3,73 Ratio allows you to maintain the factory drivetrain logic while highlighting its dynamic potential.

Condition, origin, and practical application

The offered item is used, which in the case of original BMW differentials often provides a cost-effective solution while maintaining appropriate quality. Such salvaged components are commonly used both for standard repairs and for gear ratio modifications to tailor the car's characteristics to an individual driving style.

The rear differential from this series works well in:

• drivetrain repairs following a differential failure,
• gear ratio conversions in more dynamically driven cars,
• projects based on the E90/E91/E92 platform where maintaining the original BMW architecture is essential.

Technical support and gear ratio selection

If you want to better understand how the 3.73 ratio will affect your car's behavior, it is worth checking out specialized materials. Practical tips on choosing a rear differential for your driving style can be found in the article Salvaged drive axles and differentials – how to choose gear ratios for your driving style, where various configurations, application examples, and the most common driver questions are discussed.

Owners of BMWs from model years that are increasingly treated as youngtimers may also consider a broader modernization of the car using salvaged components. Inspiration and scenarios for refreshing your vehicle can be found in the guide The second life of a youngtimer – how used car parts rejuvenate cars from the 1998–2012 model years, which describes, among other things, the approach to the drivetrain in popular BMW models.

Related items from the same group

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, rear axles, or related drivetrain parts, check out the available parts in the BMW Differentials category.