BMW 7 Series E65 745i N62 Rear Differential Diff 3,38 Ratio 7526370 WARRANTY

BMW 7 Series E65 745i N62 Rear Differential Diff 3,38 Ratio is an original drivetrain component designed for installation on the rear axle of the E65 generation 7 Series model with the N62 engine. Thanks to its factory design, it ensures consistent drivetrain operation, proper torque distribution, and stable vehicle behavior at various speeds. This solution is dedicated to drivers who expect to maintain driving characteristics in accordance with the manufacturer's specifications.

Specifications and technical data

• SKU: 7526371
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7526370
• Substitutable numbers: 33107526371 33107526370, 33107514799 33107514800, 7526371 7526370, 7514799 7514800
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function in the drivetrain

The presented rear differential is a component from the Differentials category, responsible for transferring power to the rear wheels and adjusting wheel rotational speed to driving conditions. The applied 3.38 ratio allows for maintaining factory acceleration dynamics, drivetrain refinement, and predictable vehicle behavior during acceleration and engine braking.

Its placement on the rear axle promotes even load distribution within the drivetrain, which is important for both component durability and ride comfort. A properly selected differential ratio affects engine RPM at a given speed, and consequently, fuel consumption, acoustics, and the perceived flexibility of the powertrain.

Benefits of using an original rear differential

Choosing an original rear differential for the BMW 7 Series E65 with the N62 engine allows for maintaining the structural integrity of the entire drivetrain. This component has been designed with the specific vehicle weight, engine characteristics, and automatic transmission operation in mind, which translates into:

• stable torque transfer to the rear wheels,
• predictable car behavior during load changes,
• proper cooperation with the vehicle's electronic systems,
• maintenance of the factory driving character.

As a used part, the differential is a cost-effective solution while maintaining the original design. It is a practical choice for drivetrain repairs when you want to match factory specifications without having to use replacements with uncertain parameters.

Ratio selection and vehicle compatibility

The 3.38 ratio is a key parameter when selecting a differential for a specific BMW 7 Series E65 745i N62 configuration. Properly matching the ratio to the transmission and engine management system helps avoid drivetrain operation issues, electronic errors, or unwanted changes in driving characteristics. In practice, this means maintaining factory engine RPM at typical highway speeds and consistent operation of driver assistance systems.

To better understand the impact of the final drive ratio on dynamics and ride comfort, it is worth checking out practical tips on selecting a differential for your driving style – this is discussed in detail in the article Dismantled drive axles and differentials – how to choose ratios for your driving style, where you will find definitions, configuration examples, and answers to the most frequently asked questions.

Condition, origin, and practical application

The offered differential is a used component, sourced from dismantling, which allows for combining reasonable cost with the preservation of original BMW specifications. Such components are popular choices for both standard repairs and replacing worn parts in cars that are used intensively or have higher mileage. In many cases, installing an original used differential is a more predictable solution than using new replacements of unknown durability.

If you are interested in a broader approach to car modernization using recycled parts, including drivetrain elements, it is worth checking out the eco-tuning concept described in the article Eco-tuning in practice: how to increase performance while reducing your carbon footprint with recycled parts, where you will find practical examples of using used components.

Expansion and other BMW differentials

If you are planning a comprehensive repair or modernization of the drivetrain area in your BMW and need other elements from the same group, such as drive axles, final drives, or additional differentials, check the available parts in the BMW Differentials category.