BMW Z4 Series E89 Roadster Rear Differential Diff 3,73 Ratio 7576668 WARRANTY

Listing details

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

BMW Z4 Series E89 Roadster Rear Differential Diff 3,73 Ratio is an original drivetrain component from the Differentials category, designed for installation on the rear axle of this model. It ensures proper torque transfer to the wheels, stable handling, and predictable vehicle behavior during acceleration and load changes. This solution is dedicated to drivers who want to maintain the factory drivetrain characteristics and the consistent operation of the rear axle.

Specifications and technical data

• SKU: 7576668
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7576668
• Substitutable numbers: 33107576669, 33107576668, 7576669, 7576668
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function in the drivetrain

The presented rear differential is structurally matched to the BMW Z4 E89 Roadster, where it is responsible for distributing drive to the rear wheels and maintaining the correct final drive ratio. Its placement on the vehicle in the rear axle area allows for direct cooperation with the half-shafts and the rest of the drivetrain, maintaining the dynamic handling characteristic of this model.

Selecting the correct differential is crucial for:

• consistency in the operation of the gearbox and the rear axle,
• predictable vehicle throttle response across the entire rev range,
• maintaining factory acceleration characteristics and engine speeds.

Technical specifications and compatibility

The differential belongs to the specialized Differentials category, which means it has been designed for precise load transfer on the rear axle. The 3,73 ratio is a solution often chosen for cars with a sporty character, as it provides a distinct throttle response while maintaining driving comfort in everyday use.

The component has a dedicated OEM part number and associated interchangeable numbers, which facilitates verifying compatibility with a specific vehicle configuration. This allows for precise matching of the differential to a given BMW unit, taking into account the engine version and the transmission used.

Condition, origin, and advantages of using a used part

The offered differential is a used part, sourced from dismantling, which allows for maintaining the manufacturer's original specification while optimizing repair costs. In the case of drivetrain components, such a solution is often chosen by workshops and conscious users who value factory fitment and proven construction.

Using an original used differential allows you to:

• maintain drivetrain consistency with other components,
• preserve the driving character typical of the BMW Z4 E89 Roadster,
• reduce the risk of compatibility issues compared to aftermarket replacements of uncertain origin.

Ratio selection and expert support

When replacing a rear differential, it is crucial to match the ratio to your driving style and drivetrain configuration. It is worth paying attention to compatibility with the vehicle's factory parameters to avoid unwanted changes in dynamics and drivetrain operation. A detailed discussion of the principles of selecting drive axles and differentials, along with examples and practical tips, can be found in the article Dismantled drive axles and differentials – how to choose ratios for your driving style, which explains the relationships between gear ratios and vehicle behavior in an accessible way.

If you would like to learn more about the use of original used parts in cars of this brand, including the principles of selection by OEM number and practical verification procedures, the post BMW – sports performance and precision. How do original used parts extend the life of a Bavarian icon? will be helpful, describing how to consciously plan repairs and upgrades in BMW vehicles.

Expansion and modernization of the BMW drivetrain

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

Choosing the right differential for the BMW Z4 E89 Roadster allows you to maintain the combination of precise handling and dynamic throttle response characteristic of this model. A properly selected component from the Differentials category provides a solid foundation for both standard operation and further drivetrain modifications if you plan more advanced changes to the car in the future.