Audi A6 C8 2.0TFSIe Rear Axle Differential Diff I= 44:10 RQA 09R500043C WARRANTY

Listing details

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

Audi A6 C8 2.0TFSIe Rear Axle Differential Diff I= 44:10 RQA is an original drivetrain component from the Differentials category, designed for the vehicle's rear axle. The design, prepared for use with a petrol engine and an automatic transmission, ensures stable torque distribution and predictable vehicle behavior in various road conditions. This is a solution for users who expect precise drivetrain operation and consistency with the factory handling characteristics of an Audi.

Specifications and technical data

• SKU: 09R500043C
• Mark: Audi
• Condition: Used
• OEM Part Number: 09R500043C
• Substitutable numbers: 09R500043C, 09R 500 043 C
• Location on the vehicle: Rear
• Fuel type: Petrol
• Gearbox type: Automatic
• Part type: Differential & Housing Assembly
• Category: Differentials

Purpose and drivetrain compatibility

The presented differential is designed for installation on the rear axle of the Audi A6 C8 generation with a 2.0 TFSI petrol engine and an automatic transmission. The applied gear ratio of I= 44:10 RQA allows for maintaining factory acceleration parameters, engine speed, and fuel consumption, which is particularly important when replacing drivetrain components in modern vehicle designs.

Selecting the correct differential for a specific engine and transmission version is crucial for the proper operation of electronic systems, such as traction control or electronic stability control. Using a unit dedicated to a specific drivetrain variant minimizes the risk of improper interaction with control modules and reduces the need for additional modifications.

Operating characteristics and advantages

The Audi A6 C8 2.0TFSIe Rear Axle Differential is responsible for distributing torque between the rear wheels, which directly affects vehicle stability during acceleration, cornering, and high-speed driving. A properly selected gear ratio translates into:

• factory-consistent driving feel and predictable throttle response,
• proper interaction with the automatic transmission,
• maintaining the correct engine RPM range at various speeds,
• stable vehicle behavior in driving modes offered by onboard systems.

For the user, this means maintaining the driving character typical of the Audi A6 C8, without unwanted changes in dynamics or ride comfort. The original design, from the same group of components as those factory-installed, also helps reduce noise and vibration in the cabin.

Condition, origin, and installation aspects

The offered item comes from disassembly and is classified as used, which allows for an economical repair of the drivetrain while maintaining the original Audi technical specifications. This type of differential is intended for installation in place of the factory component, using standard mounting points and original rear axle design solutions.

During replacement, it is recommended to:

• verify the oil condition in the system and replace it according to the vehicle manufacturer's recommendations,
• inspect cooperating components (half-shafts, mounts, bushings),
• perform adaptation or check parameters in the control units, if required by the service procedure for the specific model.

This approach allows for stable, repeatable drivetrain operation and reduces the risk of additional interventions in the future.

Technical support and gear ratio selection

Selecting the right differential for your driving style and drivetrain configuration has a significant impact on driving feel and component durability. If you want to better understand how the final drive ratio affects dynamics, flexibility, and driving comfort, it is worth consulting specialist materials. Practical tips, configuration examples, and a discussion of the differences between factory solutions and replacements can be found in the article Dismantled drive axles and differentials – how to choose gear ratios for your driving style.

Related items from the same group

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 drive axles, differentials, or other components responsible for torque transmission, check out the available parts in the Audi Differentials category.