Audi S1 8X 2.0 TFSI CWZA Quattro Rear Axle Differential PFZ 0BR525010E WARRANTY

Listing details

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

Audi S1 8X 2.0 TFSI CWZA Quattro Rear Axle Differential PFZ is a component from the Differentials category, designed for operation in the rear axle of the drivetrain. This solution is engineered for precise torque distribution in the sporty quattro drive system, ensuring stable handling and predictable vehicle behavior.

Specifications and technical data

• SKU: 0BR525010E
• Mark: Audi
• Condition: Used
• OEM Part Number: 0BR525010E
• Substitutable numbers: 0BR525010E, 0BR 525 010 E
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function in the drivetrain

The rear differential in the Audi S1 8X is responsible for distributing power to the rear axle wheels, working in conjunction with the quattro system and the vehicle's electronics. Its placement in the rear drive axle area means this component has a direct impact on traction, stability at higher speeds, and the car's behavior during acceleration on surfaces with varying grip levels.

A properly selected and functional differential reduces wheel slip, improves power transfer from the 2.0 TFSI unit to the road, and supports the operation of safety systems. This is particularly important in dynamically driven S1 units, where the drivetrain operates under higher loads than in standard versions.

Benefits of using an original differential

The original component from the Differentials group ensures compliance with Audi's factory specifications, which translates into:

• proper cooperation with the quattro drive and control electronics,
• preservation of factory handling and stability characteristics,
• correct gear ratio matched to the 2.0 TFSI CWZA unit,
• consistency with other components of the rear drivetrain.

As a result, installing such a differential is a technically safe solution, allowing for the restoration of the vehicle's original driving properties after a failure or wear of the previous axle.

Characteristics of the used component

The presented rear differential is a used component, sourced from dismantling. Such components are frequently chosen for repairs of sports and performance cars, where a new subassembly can be expensive or difficult to obtain. A used rear axle allows for a significant reduction in repair costs while maintaining the original design and compatibility with the specific model.

Before installation, a standard workshop procedure is recommended: verifying clearances, checking for leaks, assessing the oil condition, and – if necessary – replacing seals and transmission oil in accordance with the vehicle manufacturer's recommendations. This approach increases the durability of the component and minimizes the risk of future service interventions.

Choosing a differential for driving style and car configuration

In the case of a sports model like the Audi S1 8X, the proper selection of the rear differential is important not only for durability but also for the handling character. It is worth paying attention to the compatibility of gear ratios with the factory drive configuration and whether the axle will be used primarily for road or track conditions. Practical tips on gear ratios and matching the axle to driving style, discussed in more detail in the article Dismantled drive axles and differentials – how to choose gear ratios for your driving style, may be helpful in this regard.

Audi differentials – expansion and modernization of the drivetrain

If you are planning a comprehensive repair or modernization of the drivetrain in your Audi and need other elements from the same group, such as additional axles, differential gears, or complete drive units, check the available parts in the Audi Differentials category.

When choosing used components for the drivetrain, it is also worth analyzing the differences between new and dismantled parts in terms of costs, availability, and durability – these issues are discussed in the material Car parts – new or used? Comparing costs, quality, and durability.