BMW E87 E90 E91 318d 120d Rear Differential Diff 3,07 Ratio 7598855 WARRANTY

Description

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 E91 318d 120d Rear Differential Diff 3,07 Ratio is an original rear differential with a 3.07 gear ratio, designed for installation in the drive axle of selected BMW 1 Series and 3 Series models. This component is sourced from vehicle dismantling, allowing for an economical yet technically sound repair of the drivetrain. Thanks to its factory-spec construction, it ensures proper integration with the rear axle and stable torque transfer to the wheels.

Specifications and technical data

• SKU: 7598855
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7598855
• Substitutable numbers: 7598855, 33107566170, 7566170, 33107524308, 33107566169, 33107524307, 7524308, 7566169, 7524307
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function in the drivetrain

The presented differential belongs to the Differentials category and is mounted in the rear section of the vehicle, within the drive axle area. It is responsible for distributing torque between the rear wheels and providing the correct gear ratio, which directly impacts the dynamics, flexibility, and refinement of the drivetrain in BMW E87 and E90/E91 models equipped with diesel engines.

The 3.07 ratio is commonly used in diesel units as it provides an optimal balance between acceleration and engine RPM at highway speeds. A properly selected differential helps reduce noise, improve ride comfort, and maintain stable fuel consumption.

Benefits of using an original BMW differential

Using an original differential sourced from dismantling instead of a worn or damaged unit allows you to maintain the factory handling and drivetrain characteristics. The axle construction is matched to the suspension geometry, half-shafts, and body mounts, which facilitates installation and minimizes the risk of improper fitment.

The main advantages of this solution include:

• Factory compatibility with the drivetrain and suspension of dedicated BMW models.
• A properly selected gear ratio that supports smooth, economical driving and stable vehicle behavior at higher speeds.
• The possibility of direct replacement of a damaged axle without the need for structural modifications.
• An economical alternative to new components while maintaining correct operating parameters.

Vehicle placement and installation aspects

The differential is designed for installation on the rear axle of the vehicle, in the drive axle area. In practice, this means it works in conjunction with the driveshaft from the transmission side and the half-shafts leading to the rear wheels. Proper installation requires maintaining alignment, correct tightening of mounts, and checking for connection leaks.

Before purchasing, it is worth verifying the compatibility of the differential with your specific engine and drivetrain version, taking into account the transmission type and the factory axle ratio. This will help you avoid issues with drivetrain operation, speedometer errors, or unwanted changes in driving characteristics.

Condition and use in repairs

The offered component is in used condition, meaning it comes from a previously operated vehicle but is suitable for further use after proper installation. Such differentials are often chosen for post-accident repairs, replacing worn-out axles, or when modifying gear ratios to match the car’s characteristics to an individual driving style.

For more advanced projects – e.g., changing the gear ratio from the factory setting – it is worth consulting a guide on selecting axles and differentials. A detailed discussion of the topic can be found in the article Dismantled drive axles and differentials – how to choose gear ratios for your driving style, which describes the principles of gear selection, configuration examples, and practical tips.

Expanding your BMW drivetrain repair

If you are planning a comprehensive repair or upgrade of your BMW’s drivetrain and need other components from the same group, such as additional axles, differentials with different ratios, or compatible rear-wheel drive parts, check out the available parts in the BMW Differentials category.