BMW Z4 E85 2.0i N46 2.5i N52 Rear Differential Diff 3,38 Ratio 7545564 WARRANTY

BMW Z4 E85 2.0i N46 2.5i N52 Rear Differential Diff 3,38 Ratio is an original drivetrain component, specifically designed for the rear axle of this model. Thanks to its factory gear ratio, it ensures consistent handling, predictable traction, and driving characteristics in line with the manufacturer's specifications. This solution is intended for users who expect precise drivetrain performance while maintaining the proper characteristics of the N46 and N52 engines.

Specifications and technical data

• SKU: 7545565
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7545564
• Substitutable numbers: 33107545565 33107545564, 7545565 7545564
• Location on the vehicle: Rear
• Category: Additional Differential Parts

Purpose and compatibility

The presented differential is dedicated to the BMW Z4 E85 with 2.0i N46 and 2.5i N52 engines, where it operates on the vehicle's rear axle. The applied 3.38 gear ratio was factory-selected to balance acceleration dynamics with comfortable engine RPM during highway driving. Installation in the rear axle allows for proper cooperation with the stock gearbox and vehicle electronics.

Technical and functional characteristics

The differential is responsible for distributing torque to the rear wheels, stabilizing the car's behavior during acceleration, engine braking, and cornering. The properly selected 3.38 ratio affects:

• smooth starting and predictable throttle response,
• stable drivetrain operation at higher speeds,
• acoustic comfort in daily use.

As an original BMW component, the differential retains factory mounting points and geometry, which facilitates installation and reduces the risk of fitment issues with the suspension and driveshaft.

Use in service and upgrades

This rear differential is suitable both as a part for standard drivetrain repair and for replacing a worn-out mechanism after intensive use. It can also be used in projects where the Z4 E85 owner aims to restore stock gear ratio parameters after previous modifications. By maintaining the original specification, it is a mechanically safe solution that complies with the manufacturer's design assumptions.

Condition, origin, and benefits of choosing a used part

The offered differential is an original BMW part from the secondary market. Choosing a used component allows for a significant reduction in repair costs compared to a new unit, while maintaining factory construction and fitment. For many BMW Z4 E85 users, this is a reasonable compromise between quality and budget, especially when repairing vehicles used on a daily basis.

Knowledge expansion and part selection

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 housings, mounts, or additional gears, check out the available parts in the Other BMW differential parts category.

For drivers who want to better understand how to optimally use the market for used and replacement parts, our blog article will be helpful: Repairing a Volkswagen for pennies? Discover how to save on original car parts. Although the description mainly concerns Volkswagen, the principles of selecting and verifying used parts presented there are universal and also useful for BMW owners.

If you are interested in a wider use of secondary market components when retrofitting or modifying vehicles, it is also worth reading the guide Retrofitting in VAG and BMW group cars: How to cheaply equip a car using used parts from higher versions?, which shows how to consciously plan upgrades using original components.