BMW E81 E87 LCI 123d N47S Rear Differential Diff 2,79 Ratio 7566223 WARRANTY

Listing details

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

BMW E81 E87 LCI 123d N47S Rear Differential Diff 2,79 Ratio is a rear differential designed for facelifted 1 Series models with the N47S engine, ensuring precise power transmission and stable handling. The correct final drive ratio affects acceleration characteristics, engine RPM at cruising speeds, and the overall refinement of the drivetrain. This is a solution for users who expect a proven, factory-spec component with predictable performance parameters.

Specifications and technical data

• SKU: 7566223
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7566224
• Substitutable numbers: 33107566224, 7566224, 33107566223, 7566223
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function in the drivetrain

The differential in the BMW 1 Series is responsible for torque distribution to the rear wheels and works in conjunction with traction and stability control systems. The version prepared for the N47S unit and E81/E87 LCI bodies is structurally matched to the suspension geometry and drivetrain characteristics of these models, which translates into predictable vehicle behavior in corners and during dynamic acceleration.

Its rear-mounted position allows for optimal weight distribution and maintains the balanced handling characteristics typical of BMW. A properly selected differential ratio affects:

• throttle response and flexibility at low and medium speeds,
• engine RPM during highway driving,
• acoustic comfort and fuel consumption in daily use.

Benefits of using a 2,79 ratio differential

The 2,79 ratio configuration is a popular choice for drivers who expect a balanced compromise between dynamics and fuel economy. In practice, this means:

• smoother engine operation at cruising speeds,
• reduced drivetrain load during long-distance travel,
• more linear power delivery, which is beneficial for daily driving.

For users modifying engine software or changing wheel configurations, the correct selection of the differential ratio is crucial to maintain drivetrain consistency and avoid overloading other components.

Product characteristics and practical application

The Differentials category includes components that directly affect vehicle safety and handling predictability. The presented rear differential is designed for installation in the rear of the vehicle, replacing the factory unit without the need for modifications to the body or suspension (provided the model version is compatible).

In practice, installing this component is particularly recommended in situations where:

• the original differential has suffered mechanical wear or damage,
• disturbing noises are coming from the rear of the drivetrain,
• a replacement is necessary following a collision or suspension work.

Using a genuine OEM component allows you to maintain the factory drivetrain characteristics, which is important for both ride comfort and the longevity of other components.

Fitment, identification, and technical aspects

To correctly select the differential for a specific BMW 1 Series vehicle, it is worth paying attention to the model designation, the facelifted body version, and the engine type. The product has an assigned OEM part number and interchangeable numbers, which facilitates verification against the manufacturer's catalog and minimizes the risk of selecting the wrong variant.

In case of doubt, it is useful to compare the data from the differential's identification plate or consult with a mechanic specializing in the BMW brand. This ensures that the installed component will work correctly with the existing transmission, half-shafts, and vehicle electronics.

Expert support and further reading

If you want to better understand how the final drive ratio affects vehicle behavior, drivetrain durability, and driving experience, it is worth checking out our guide. A detailed discussion on selecting ratios, differences between various configurations, and practical examples can be found in the article Dismantled drive axles and differentials – how to choose ratios for your driving style.

If you are planning a comprehensive repair or upgrade of your BMW's drivetrain and need other components from the same group, such as differential housings, drive shafts, or additional mounting hardware, check out the available parts in the BMW Differentials category.