BMW E87 E90 Rear Differential Diff 3,38 Ratio 7524319 RECONDITIONED

Listing details

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

BMW E87 E90 Rear Differential Diff 3,38 Ratio RECONDITIONED is a professionally refurbished rear differential designed for the BMW 1 and 3 Series drivetrain. The controlled reconditioning process restores the proper operation of the drivetrain, ensuring a stable gear ratio, quiet operation, and predictable vehicle handling. This is a solution for users who expect a solid part that maintains factory characteristics.

Specifications and technical data

• SKU: 7524319-1
• Mark: BMW (Genuine OE)
• Condition: Remanufactured
• OEM Part Number: 7524319
• Substitutable numbers: 33107524319, 7524319, 33107524320, 7524320
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function in the drivetrain

The offered differential belongs to the Differentials category and is responsible for distributing torque to the rear axle wheels. Its location at the rear of the vehicle means the component directly affects traction, stability during acceleration, and the overall refinement of the drivetrain.

The 3.38 ratio is a popular choice for drivers seeking a balanced compromise between dynamics and fuel economy. A properly selected rear differential helps maintain factory acceleration characteristics and engine RPM at highway speeds, which is important for both daily commuting and more dynamic driving.

Reconditioning and benefits of use

The remanufactured status means that the differential has undergone a technical renewal process aimed at restoring the correct operation of the mechanism. In practice, this translates into:

• reduced backlash in the final drive and differential mechanism,
• reduction of noise and vibrations originating from the rear axle,
• stable torque transfer to the rear wheels,
• maintenance of performance characteristics similar to a factory BMW part.

For the user, this means more predictable handling, better drivetrain refinement, and the ability to restore the vehicle's original driving properties without the need for unreliable aftermarket replacements.

BMW fitment and installation aspects

The differential is designed for BMW vehicles, ensuring structural compatibility with factory mounting points and the rear-wheel-drive system. As a result, installation is straightforward, without the need for structural modifications, and the unit works seamlessly with existing suspension components and half-shafts.

The original OEM part number and available interchangeable numbers allow for precise verification of compatibility with specific engine and drivetrain versions. Before purchasing, it is recommended to compare the markings with the vehicle documentation or the number on the differential being removed from the car to ensure that the ratio and type of differential match the factory configuration.

How to select the gear ratio and differential number

Proper selection of the rear differential for your driving style and vehicle configuration is crucial for comfort and performance. For BMW 1 and 3 Series, various gear ratios are available, so before making a purchase decision, it is worth analyzing whether your priority is dynamic acceleration or lower RPM at constant speeds. Comparing the OEM part number and interchangeable numbers with the manufacturer's catalog or the identification plate on the differential installed in the car is helpful.

If you want to better understand how the differential ratio affects vehicle behavior, how to select a differential for a specific engine version, and what the differences are between used and reconditioned components, check out the article Dismantled drive axles and differentials – how to choose ratios for your driving style. This is a practical addition to your knowledge when planning a rear differential replacement in a BMW.

Why choose a reconditioned BMW differential

Choosing a reconditioned differential for a BMW is a sensible compromise between cost and quality. You receive a component with parameters close to factory specifications while reducing expenses compared to a new part. Additionally, you maintain full compatibility with the vehicle's design, which minimizes the risk of installation and operational issues.

If you are considering whether a reconditioned OEM part or a new aftermarket replacement is a better solution, the guide 5 reasons why a used OEM part is a better choice than a replacement, which discusses practical selection criteria using popular models as examples, may be helpful.

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 axles, differentials with different ratios, or complete rear drive assemblies, check out the available parts in the BMW Differentials category.