BMW E90 E91 E92 335i N54 Rear Differential Diff 3,46 Ratio 7572054 WARRANTY

BMW E90 E91 E92 335i N54 Rear Differential Diff 3,46 Ratio is an original drivetrain component from the Differentials group, designed for installation on the vehicle's rear axle. This used final drive with a 3,46 ratio provides a solid foundation for restoring proper drivetrain operation in high-performance 335i versions with the N54 engine, ensuring stable torque transfer to the wheels.

Specifications and technical data

• SKU: 7572054
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7572054
• Substitutable numbers: 33107572054, 7572054, 33107572055, 7572055
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function of the differential

The offered rear differential is structurally matched to BMW 3 Series E90, E91, and E92 models in the 335i version with the N54 unit. Its task is to distribute torque between the rear axle wheels and adjust the rotational speed of the driveshaft to the rotational speed of the wheels, in accordance with the applied 3,46 ratio. A properly selected final drive affects the acceleration characteristics, flexibility, and smooth operation of the entire drivetrain.

Key technical features

The differential belongs to the Differentials group and is intended for installation in the rear of the vehicle. Its placement on the rear axle means it works in conjunction with the driveshaft and half-shafts, which requires maintaining proper geometry and mounting rigidity. The final drive construction is prepared to handle the high torque generated by the N54 engine, which is important both in daily use and during dynamic driving.

The component is sourced from dismantling, making it an attractive solution for users looking for an original BMW part while maintaining reasonable service costs. A used differential is a good solution when the existing final drive has suffered mechanical wear, is noisy, has excessive play, or has housing damage.

Application in BMW 335i N54

The rear final drive with a 3,46 ratio is characteristic of powerful 335i petrol versions, where a balance between acceleration and comfortable engine RPM during highway driving is essential. The correct differential ratio:

• affects the dynamics of starting and accelerating across the entire rev range,
• shapes engine RPM at a constant driving speed,
• is significant for fuel consumption and acoustic comfort.

For users planning drivetrain modifications or replacing a damaged final drive, using a differential with the same ratio is crucial for maintaining proper cooperation with the existing gearbox and vehicle electronics.

Condition, origin, and selection of parts

The offered component is in used condition, meaning it comes from a previously operated BMW vehicle. This type of solution is often chosen in professional workshops when original specifications and fitment for a specific model are prioritized, while repair cost optimization is also important. Before installation, a standard service procedure is recommended, including checking for leaks, play, and changing the differential oil according to the manufacturer's recommendations.

To ensure the final drive will be suitable for a specific vehicle configuration, it is worth verifying compatibility with the OEM part number and interchangeable numbers in service documentation or via the VIN. This minimizes the risk of mismatching the ratio or mounts.

Technical support and additional materials

For users who want to better understand the impact of the final drive ratio on driving characteristics, a guide describing how to choose a differential for a driving style, differences in ratios, and practical application examples will be useful. A detailed discussion can be found in the article Dismantled final drives and differentials – how to choose ratios for your driving style, which describes, among other things, compatibility issues, operation, and the most frequently asked user questions.

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 final drives, differentials, or related sub-assemblies, check the available parts in the BMW Differentials category.