Audi A6 C8 3.0 TFSI Rear Axle Differential Diff RPZ 09R500043B WARRANTY

Listing details

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

The Audi A6 C8 3.0 TFSI Differential Rear Axle RPZ is an original drivetrain component from the Differentials - Diffs category, designed for installation on the rear axle of Audi models with a gasoline engine and automatic transmission. A used rear axle allows for an economical yet technically sound repair of the drivetrain, while maintaining factory operating characteristics and gear ratios. This is a solution for users who expect a proven part with a construction compliant with manufacturer standards.

Specifications and technical data

• SKU: 09R500043B
• Mark: Audi
• Condition: Used
• OEM Part Number: 09R500043B
• Substitutable numbers: 09R500043B, 09R 500 043 B
• Location on the vehicle: Rear
• Fuel type: Petrol
• Gearbox type: Automatic
• Part type: Differential & Housing Assembly
• Category: Differentials

Purpose and Compatibility

The presented differential is designed for the rear axle of the Audi A6 C8 generation with the 3.0 TFSI engine, paired with an automatic transmission and a gasoline engine-based drivetrain. Its placement on the rear axle ensures proper torque distribution and stable operation of the entire drivetrain, in line with the manufacturer's design specifications.

Thanks to the use of original Audi construction, the differential maintains appropriate gear ratio characteristics, which translates to predictable vehicle behavior, correct interaction with control electronics, and comfortable, smooth gear changes in the automatic transmission.

Construction and Operating Parameters

The rear axle in the Audi A6 C8 3.0 TFSI is responsible for transferring power to the rear axle and properly distributing torque between the wheels. The differential's construction is adapted to the loads generated by the high-power gasoline engine and the characteristics of the automatic transmission, allowing for stable operation in both daily driving and dynamic acceleration.

Selecting the appropriate differential is crucial for:

• maintaining correct gear ratios across the entire speed range,
• ensuring smooth acceleration and engine braking,
• maintaining driving stability at higher speeds,
• correct interaction with safety and traction systems.

The original construction from the Differentials - Diffs category minimizes the risk of compatibility issues that can arise with the use of random aftermarket replacements.

Practical Application and Benefits of Installation

Installing this differential in an Audi A6 C8 3.0 TFSI allows for the restoration of proper rear-wheel drive operation in case of wear or damage to the existing axle. A used part is a good choice for drivers who want to balance repair costs with maintaining the factory specifications of the drivetrain.

The main benefits of using this differential include:

• maintaining the vehicle's factory handling characteristics,
• gear ratio consistency with the automatic transmission,
• proper matching to the gasoline engine's parameters,
• the possibility of repairing the drivetrain without interfering with control electronics.

For users who want to better understand gear ratio selection and the impact of the drive axle on vehicle behavior, the article: Drive Axles and Differentials from Dismantling – How to Choose Gear Ratios for Your Driving Style, which discusses practical aspects of differential configuration, will be helpful.

Characteristics as a Used Part

The differential comes from dismantling, which allows for obtaining a part with factory construction at a more favorable price than a new component. As a used part, it is primarily intended for service repairs, replacement of a damaged axle, or rebuilding the drivetrain after a collision or mechanical failure.

Before installation, the standard workshop procedure is recommended: verifying the oil level in the system, checking connection seals, and confirming correct mounting according to Audi service documentation. This approach allows for full utilization of the original construction's potential and minimizes the risk of subsequent leaks or operational noises.

Other Audi Differentials and Further Information

If you are looking for other differentials for Audi, including solutions for different models and drivetrain configurations, check out our offer at Audi Differentials - Diffs, where you will find a wide selection of rear and front axles from dismantling.

For those interested in a broader context of gear ratio selection, differences in axle construction, and practical examples of configurations in various models, we also recommend reading the technical guide: Drive Axles and Differentials from Dismantling – How to Choose Gear Ratios for Your Driving Style, which explains the important issues related to differential replacement in an accessible way.