BMW 6 Series E63 645Ci 650i Rear Differential Diff 3,46 Ratio 7526374 WARRANTY

Listing details

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

BMW 6 Series E63 645Ci 650i Rear Differential Diff 3,46 Ratio is an original drivetrain component from the Differentials category, designed for installation in the rear of the vehicle. It ensures precise torque transfer to the wheels, which translates into stable handling and predictable vehicle behavior during dynamic driving. A used differential is a sensible choice for repairs when you want to maintain the factory characteristics of your BMW drivetrain.

Specifications and technical data

• SKU: 7526374
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7526374
• Substitutable numbers: 33107526374, 7526374, 33107526375, 7526375
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function in the drivetrain

The presented differential is a component of the rear drive axle, responsible for distributing power to the rear wheels and providing the correct gear ratio relative to the transmission. Thanks to its properly selected ratio, it ensures:

• consistent acceleration across the entire engine RPM range,
• stable vehicle behavior at higher speeds,
• proper cooperation with vehicle electronics (traction and stability control systems).

This solution is particularly important in powerful BMW 6 Series units, where precise power delivery has a direct impact on perceived dynamics and driving comfort.

Benefits of using an original BMW differential

Choosing an original differential from disassembly allows you to maintain the factory operating parameters of the drivetrain. In practice, this means:

• preserving the balance between dynamics and comfort characteristic of BMW,
• proper fitment with stock half-shafts, driveshafts, and mounts,
• reducing the risk of incorrect gear ratios that could disrupt the operation of the transmission and auxiliary systems.

For 645Ci and 650i model owners, this is particularly important because the consistency of the entire drivetrain affects the smoothness of acceleration, refinement, and the predictability of the car's behavior in corners.

Vehicle placement and installation aspects

The differential is designed for installation in the rear of the vehicle, on the drive axle. This placement requires maintaining proper suspension geometry and correctly tightening all mounting points. During installation, it is worth paying attention to:

• the condition of the rear subframe bushings and mounts,
• the tightness of connections with the half-shafts,
• proper venting and refilling of gear oil according to the manufacturer's recommendations.

A properly installed differential minimizes noise and vibration, and also supports stable rear suspension operation under load.

Use in service and upgrades

This differential model is suitable both for standard post-failure repairs and for drivetrain modifications when you want to maintain the stock driving character of your BMW. A used component allows you to optimize service costs while maintaining a configuration close to the factory standard.

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 drive axles, final drives, or other differentials, check out the available parts in the BMW Differentials category.

How to choose a differential for your driving style

When choosing a differential for a BMW 6 Series, it is worth considering your driving style, transmission type, and expected vehicle behavior. A driver who prefers calm highway driving will have different requirements than a user who frequently utilizes the full potential of the engine. To better understand the relationship between gear ratios, dynamics, and comfort, the following guide will be helpful: Drive axles and differentials from disassembly – how to choose ratios for your driving style.