Audi S6 C7 4.0 TFSI Quattro Rear Differential Diff 37:9 MKU 0BF500043T WARRANTY

Listing details

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

Audi S6 C7 4.0 TFSI Quattro Rear Differential Diff 37:9 MKU 0BF500043T WARRANTY is an original drivetrain component from the Differentials category, designed for rear-axle operation in all-wheel-drive versions. This solution is engineered for stable power delivery from the petrol engine to the road, while maintaining the correct gear ratio and handling characteristics typical of Audi S models.

Specifications and technical data

• SKU: 0BF500043T
• Mark: Audi
• Condition: Used
• OEM Part Number: 0BF500043T
• Substitutable numbers: 0BF500043T, 0BF 500 043 T
• Location on the vehicle: Rear
• Fuel type: Petrol
• Gearbox type: Automatic
• Part type: Differential & Housing Assembly
• Category: Differentials

Purpose and technical specifications

The presented rear differential is designed to work with the petrol engine and automatic transmission, which is crucial for maintaining the proper operation of the entire drivetrain in the Audi S6 C7 4.0 TFSI Quattro. The applied 37:9 MKU gear ratio corresponds to the factory configuration, ensuring that the drivetrain maintains the correct parameters for acceleration, rotational speed, and the operation of driver assistance systems.

Its placement on the rear axle allows for effective torque distribution between the front and rear, which translates into predictable vehicle behavior in corners and stability at higher speeds. A properly selected differential ratio has a direct impact on the smoothness of the automatic transmission, fuel consumption, and driving comfort in both daily and dynamic conditions.

Benefits of using an original rear differential

Choosing an original rear differential for the Audi S6 C7 primarily ensures a perfect fit for the specific Quattro drivetrain configuration. This component was factory-designed to work with the given petrol engine and automatic transmission specification, which minimizes the risk of electronic system malfunctions and excessive stress on the drivetrain.

Key advantages of using the correct rear differential in this model include:

• maintaining factory acceleration characteristics and transmission performance,
• stable transfer of high torque to the rear axle,
• proper integration with traction and electronic stability control systems,
• reduction of noise, vibrations, and uneven tire wear.

As a result, the drivetrain remains structurally consistent, and the car handles according to the manufacturer's specifications, which is important for both daily use and dynamic driving.

Installation zone and drivetrain compatibility

The differential operates in the rear of the vehicle, directly connected to the driveshaft and half-shafts. For the Audi S6 C7 4.0 TFSI Quattro, it is particularly important to maintain gear ratio compatibility with other drivetrain components to avoid rotational speed differences between the axles. A correctly selected rear differential ensures even load distribution across the entire system and reduces the risk of damage to the automatic transmission and intermediate components.

When replacing the differential, it is worth paying attention to compatibility with the fuel type and transmission type, as other drivetrain configurations may use different gear ratios. This model is intended for use with the petrol engine and automatic transmission, making it the right choice for repairing or restoring the factory specification of an Audi S6 C7.

Condition, origin, and practical application

The offered differential is a dismantled, used part, which allows for an economical repair of the drivetrain while maintaining the original design. In practice, this means the ability to restore the proper operation of the Quattro system without having to resort to unreliable aftermarket parts with unverified parameters. A used OEM component often fits the structural requirements better than cheaper alternatives of ambiguous origin.

If you want to better understand how to choose the axle and differential ratio for your driving style and vehicle configuration, it is worth reading our guide: Dismantled drive axles and differentials – how to choose gear ratios for your driving style. You will find practical tips on definitions, compatibility, and gear ratio selection for various models.

Additionally, if you are considering replacing a worn or noisy differential and are wondering whether to choose a used OEM part or an aftermarket replacement, the following article may be helpful: Whining differential? Why a used OEM differential is a better investment, which discusses the advantages of using original drive axles from dismantling.

Drivetrain expansion in Audi – related components

If you are planning a comprehensive repair or upgrade of the drivetrain area in your Audi and need other elements from the same group, such as additional differentials, drive axles, or related transmission components, check out the available parts in the Audi Differentials category.

This approach allows you to ensure the consistency of the entire drivetrain in one service stage, reduce the risk of future failures, and optimize labor costs. Replacing several related components during a single service process is often more beneficial than splitting the work into many separate workshop visits.