Audi S5 8T 3.0 TFSI CGWC Quattro Rear Differential 35:9 JKS 0BC500043E WARRANTY

Listing details

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

Audi S5 8T 3.0 TFSI CGWC Quattro Rear Differential 35:9 JKS is an original drivetrain component designed for the rear axle, specifically engineered for the Quattro all-wheel-drive system. The precise 35:9 gear ratio ensures consistent torque transfer, which translates into stable handling and predictable vehicle behavior. This is the ideal solution for users who expect to maintain the factory performance characteristics of their Audi's drivetrain.

Specifications and technical data

• SKU: 0BC500043E
• Mark: Audi
• Condition: Used
• OEM Part Number: 0BC500043E
• Substitutable numbers: 0BC500043E, 0BC 500 043 E
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function in the drivetrain

The rear differential in the Audi S5 8T with the 3.0 TFSI CGWC engine and Quattro drive is responsible for distributing torque to the rear wheels and working in tandem with the central drivetrain system. The 35:9 gear ratio is selected to maintain the correct engine RPM relative to vehicle speed, which is crucial for both driving dynamics and comfort.

Its placement on the vehicle at the rear axle allows for direct integration with the half-shafts and the rest of the drivetrain without the need for structural modifications. As a result, the differential plays a key role in maintaining traction and stability during acceleration, engine braking, and cornering.

Benefits of using an original differential

Using an original rear differential in the Audi S5 8T allows you to maintain:

• factory Quattro drivetrain characteristics – gear ratio compatibility with the vehicle configuration,
• proper cooperation with electronic control units and stability control systems,
• consistent operation with the existing transmission and other drivetrain components.

For users who expect predictable car behavior, especially at higher speeds and during dynamic driving, a properly selected rear differential is an essential element for safety and the longevity of the entire system.

Application in service practice

This rear differential is suitable for situations where the existing unit has suffered mechanical wear, housing damage, or if there are irregularities in drivetrain operation, such as noise under load or uneven torque transfer. Replacing it with an original component of the same gear ratio configuration avoids fitment issues and limits the risk of additional modifications.

When selecting a differential, it is worth paying attention to compatibility with the engine version, drive type, and gear ratio to maintain the parameters specified by the manufacturer. A properly selected rear differential supports even tire wear, stability during load changes, and correct interaction with driver assistance systems.

Mounting zone and vehicle integration

Its location in the rear of the vehicle means the differential works in direct connection with the half-shafts and suspension components. Proper installation requires maintaining alignment, correct tightening of mounts, and checking for seal integrity. Thanks to the design intended for the Audi S5 8T, this component is matched to factory mounting points, which facilitates service and reduces workshop time.

A properly installed rear differential contributes to stable vehicle handling at high speeds and during sudden changes in direction, which is important both in daily use and in more dynamic conditions.

More components from this group and technical knowledge

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

To better understand how to choose the right axle and differential gear ratio for your driving style and car configuration, it is worth reading our guide: Dismantled drive axles and differentials – how to choose gear ratios for your driving style. This is a practical source of knowledge about definitions, gear ratios, compatibility, and selecting used components.