BMW 3 Series E93 325i N53 Differential Diff 3.64 Ratio 7566173 RECONDITIONED

BMW 3 Series E93 325i N53 Differential Diff 3.64 Ratio RECONDITIONED is a professionally prepared, reconditioned rear differential designed for the drivetrain of the BMW 3 Series E93 with the N53 engine. The carefully selected 3.64 gear ratio ensures predictable drivetrain behavior, stable traction, and consistency with the factory performance characteristics of the BMW drivetrain.

Specifications and technical data

• SKU: 7566173-1
• Mark: BMW (Genuine OE)
• Condition: Remanufactured
• OEM Part Number: 7566173
• Substitutable numbers: 33107566174, 7566174, 331075661733310752851933107528518, 756617375285197528518
• Location on the vehicle: Rear
• Category: Additional Differential Parts

Purpose and function in the drivetrain

The differential in the BMW 3 Series E93 325i N53 is responsible for transferring torque to the rear wheels, distributing power, and stabilizing the operation of the entire drivetrain. It is located on the rear axle, which is crucial for proper selection and compatibility with the suspension and half-shafts in this model.

The appropriate 3.64 differential ratio affects acceleration characteristics and engine RPM at a given speed, which is significant for both daily driving and more dynamic performance. A properly selected differential reduces unwanted vibrations, noise, and wear on cooperating drivetrain components.

Reconditioned rear differential – technical benefits

The presented item is a reconditioned BMW rear differential, meaning it has undergone a process to restore full operational efficiency while maintaining the quality standards typical of OEM parts. This solution is particularly beneficial when you want to preserve the original design and performance parameters while optimizing repair costs.

A reconditioned differential is a good choice in situations where the vehicle exhibits symptoms such as whining from the rear axle area, excessive play in the final drive, or uneven power delivery. Using such a component allows for restoring proper drivetrain operation without the need to interfere with the factory suspension geometry and mounting points.

Compatibility and part identification

The differential has been designed as a component dedicated to BMW, which facilitates fitting to factory mounting points and ensures compatibility with stock half-shafts and suspension. The original OEM part number and available interchangeable numbers allow for precise verification of compatibility with a specific vehicle configuration, which is particularly important when selecting differentials with different gear ratios.

To confirm compatibility, it is worth comparing the markings with service documentation or the numbers found on the currently installed differential. This minimizes the risk of selecting the wrong gear ratio or construction version, which could affect the operation of the drivetrain and assistance systems.

Application in service practice

Replacing the rear differential in a BMW 3 Series E93 325i N53 is a standard service operation in the event of final drive wear, mechanical damage, or excessive play. Using a reconditioned component allows for:

• restoring proper power delivery to the rear axle,
• reducing noise and vibrations originating from the rear drivetrain,
• maintaining the factory handling characteristics of the vehicle,
• maintaining consistency with the original BMW design.

For workshops and individual users, this means predictable installation without the need for modifying mounts or additional structural alterations.

Related drivetrain and suspension components

When replacing the rear differential, it is worth paying attention to the condition of cooperating components, such as half-shafts, mounts, bushings, or suspension elements. For more extensive work on the rear axle, a guide on selecting used suspension components may be helpful – you can find it in the article Stock vs. sports suspension – differences in construction and is it worth buying used suspension parts?, where practical aspects of selecting and assessing the condition of parts are discussed.

If you are planning a comprehensive repair or upgrade of the drivetrain area in your BMW and need other elements from the same group, such as additional differentials or accessory transmission components, check out the available parts in the category Other BMW differential parts.