BMW E65 760i N73 Rear Differential Diff Final Drive 3,15 Ratio 7514813 WARRANTY

Listing details

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

BMW E65 760i N73 Rear Differential Diff Final Drive 3,15 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 behavior of the BMW limousine in various road conditions. A used final drive of this type is a sensible choice for drivers looking for factory fitment and a proven design without investing in a brand-new component.

Specifications and technical data

• SKU: 7514814
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7514814
• Substitutable numbers: 33107514813, 7514813, 33107514814, 7514814
• 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. A properly selected final drive ratio affects the acceleration characteristics, flexibility, and refinement of the engine in the BMW 7 Series E65 760i. Thanks to its factory design, compatibility with the suspension geometry and drivetrain is maintained, which facilitates installation and subsequent operation.

Construction and technical fitment

The differential assembly was designed by BMW as an integral part of the rear drivetrain, taking into account the high weight and power of the 760i version. The design is intended for rear-axle operation, with proper load distribution and correct transmission oil cooling. The applied solutions reduce noise and vibration, which is particularly important in luxury-class vehicles where ride comfort and drivetrain smoothness are paramount.

Benefits of using an original differential

Using an original differential from this series allows for maintaining factory drivetrain performance parameters and predictable vehicle behavior during acceleration, engine braking, and load changes. The main advantages include:

• factory fitment to the BMW E65 760i drivetrain and suspension,
• preservation of the handling characteristics intended by the manufacturer,
• consistency with drivetrain control electronics and safety systems,
• possibility of installation as a direct replacement for a worn rear axle.

As a result, the driver receives a component that works with other drivetrain elements in a predictable and repeatable manner, without the need for structural modifications.

Practical application and gear ratio selection

Selecting the right differential is important both for daily driving and more dynamic performance. It affects engine RPM at a given speed, throttle response, and acoustic comfort inside the cabin. In the case of the BMW 7 Series limousine, the correct rear axle ratio helps combine driving smoothness with adequate dynamics, without overstressing the engine.

If you want to better understand how to choose a final drive and differential for your driving style, it is worth checking out the practical tips in the article Dismantled final drives and differentials – how to choose ratios for your driving style. There, you will find a discussion of gear ratios, application examples, and answers to the most frequently asked questions regarding used drivetrain components.

Condition, origin, and cost-effectiveness

The offered item comes from dismantling and is sold as a used BMW differential, which allows for significantly reducing repair costs compared to a new OEM component. For many users, this is a beneficial compromise between price and maintaining the vehicle's original specifications. Choosing original used drivetrain components helps maintain the structural integrity of the car, which is important for both durability and the future resale value of the vehicle.

If you want to learn how using original used components affects vehicle value, the article Original used parts vs. car resale price – how not to lose money? will be helpful, as it discusses the impact of such solutions on perceived quality and repair cost-effectiveness.

If you are planning a comprehensive repair or upgrade of the drivetrain in your BMW and need other elements from the same group, such as final drives, differentials, or complete drivetrain assemblies, check out the available parts in the BMW Differentials category.