BMW X1 E84 20iX 28iX N20 Rear Axle Differential Diff 3,38 7599396 WARRANTY

Listing details

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

BMW X1 E84 20iX 28iX N20 Rear Axle Differential Diff 3,38 is an original rear drive axle from the Differentials category, designed for installation in the rear axle of BMW X1 E84 models with the N20 engine and xDrive system. This used OEM component allows for a technically correct replacement of a worn differential while maintaining the factory gear ratio and drivetrain performance characteristics. It is a solution for users seeking a robust part with a proven design, without the need for costly refurbishment of their own unit.

Specifications and technical data

• SKU: 7599397
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7599397
• Substitutable numbers: 7599397, 33107599397, 7599396
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function in the drivetrain

The presented rear differential is a component of the drivetrain system in the BMW X1 E84 with the N20 engine and all-wheel drive. It is responsible for distributing torque to the rear wheels and maintaining the correct gear ratio, which translates into stable acceleration, predictable vehicle behavior in corners, and proper cooperation with xDrive systems and vehicle electronics.

Selecting a differential with the correct gear ratio is crucial for:

• proper operation of the automatic or manual transmission,
• consistent operation of the xDrive system with the front axle and driveshaft,
• maintaining factory acceleration parameters and engine RPM at a given driving speed,
• reducing unwanted vibrations and noise in the drivetrain.

Construction and technical features of the differential

The rear axle in this BMW model uses a final drive with a specific gear ratio, adapted to the characteristics of the N20 engine as well as the weight and purpose of the X1 E84. The design is based on a classic bevel gear system with a housing adapted for mounting in the rear suspension frame, with mounting points consistent with factory brackets.

The most important features of this differential include:

• factory fitment to the rear axle geometry of the BMW X1 E84,
• compatibility with the factory driveshaft and half-shafts,
• retention of the original gear ratio, which is essential when replacing the component in an xDrive vehicle,
• housing adapted to the standard mounting and sealing system.

Benefits of using a used OEM differential

Using a used OEM differential in a BMW X1 E84 allows for maintaining the consistency of the entire drivetrain without the need for modifications. The original design ensures compliance with the vehicle's factory parameters, which is particularly important when working with traction and stability control systems.

In practice, this means:

• no need for mounting adaptations or housing modifications,
• preservation of the standard drivetrain operating characteristics,
• possibility of economical repair in case of wear or damage to the existing axle,
• easier diagnostics – operating parameters correspond to factory specifications.

Gear ratio selection and vehicle compatibility

When replacing the rear differential in a BMW X1 E84 with xDrive, it is crucial to match the gear ratio to the engine version and drivetrain configuration. Incorrect selection may result in improper operation of the xDrive system, electronic errors, and accelerated wear of drivetrain components. Therefore, before installation, it is worth verifying the part's compatibility with the markings on the old axle and the vehicle's technical documentation.

To better understand the relationship between the axle ratio and driving characteristics, it is worth checking out the technical guide: Dismantled drive axles and differentials – how to choose gear ratios for your driving style. The article explains how to select differentials in terms of gear ratios, drivetrain compatibility, and expected driving style.

Application area and BMW drivetrain upgrades

If you are planning a comprehensive repair or upgrade of the drivetrain in your BMW and need other components from the same group, such as additional differentials, axles, or related sub-assemblies, check out the available parts in the BMW Differentials category.

Summary

BMW X1 E84 20iX 28iX N20 Rear Axle Differential Diff 3,38 is a practical solution for users looking for an original rear axle for their X1 with xDrive. The used OEM component allows you to restore the proper operation of the drivetrain while maintaining the factory gear ratio and compatibility with other sub-assemblies. It is a technically consistent choice when replacing a worn or damaged differential in the rear axle.