Audi RS4 B7 Rear Driveshaft 4.2 FSI Quattro BNS Petrol 8E0501203P

Audi RS4 B7 Rear Driveshaft 4.2 FSI Quattro is a precision drivetrain component, specifically designed for the 4.2 FSI petrol engine with Quattro all-wheel drive. The original Audi design ensures stable torque transmission, proper interaction with the differential, and predictable vehicle behavior during dynamic driving. This solution is dedicated to users who expect consistency with the factory characteristics of the RS4 B7 and wish to maintain the correct geometry of the drivetrain.

Specifications and technical data

• SKU: 8E0501203P
• Mark: Audi
• Condition: Used
• OEM Part Number: 8E0501203P
• Substitutable numbers: 8E0501203P, 8E0 501 203 P, 8E0 501 203 T, 8E0501203T, 8E0 501 203 TX, 8E0501203TX
• Location on the vehicle: Rear
• Fuel type: Petrol
• Part type: Driveshaft
• Category: Driveshafts

Purpose and function in the drivetrain

The presented rear driveshaft is a component in the Driveshafts category and is responsible for transmitting power from the central part of the drivetrain to the rear axle in the Audi RS4 B7 with a 4.2 FSI petrol engine. Its task is to maintain proper alignment and reduce torsional vibrations, which translates into predictable vehicle behavior during acceleration, engine braking, and load changes in Quattro mode.

Being dedicated to the petrol version ensures compatibility with the torque characteristics of the 4.2 FSI unit, as well as with the factory settings of the RS4 B7 drivetrain. This ensures proper cooperation with the rear differential and other drivetrain components.

Compatibility and replacement numbers

The original Audi driveshaft was designed as a system component, with an assigned OEM part number and a set of interchangeable numbers. The presence of reference numbers allows for precise verification of compatibility with a specific Audi RS4 B7 4.2 FSI Quattro configuration, which is crucial when selecting a used part. In practice, this means it is possible to match the component to the car based on service documentation, manufacturer catalogs, or specialized databases.

Before purchasing, it is worth comparing the markings with the existing element in the vehicle or with data from the catalog system to ensure that the shaft will work with the current differential, gearbox, and other components.

Vehicle placement and installation aspects

The shaft is intended for installation in the rear part of the vehicle, along the drivetrain axis leading to the rear axle. This placement requires maintaining the correct installation sequence, proper alignment relative to the flanges, and checking for clearances and balance after installation. Proper installation minimizes the risk of vibrations, noise, and accelerated wear of bearings and mating parts.

During replacement, it is recommended to:

• check the condition of mounts and flexible elements in the drivetrain,
• verify cooperation with the differential and gearbox after installation,
• perform a test drive at various speed ranges to assess the operating culture of the system.

Characteristics of the used component

The offered driveshaft is a used part, sourced from dismantling, which allows for maintaining factory specifications while reducing service costs. A used OEM component usually fits better into the existing system than replacements with uncertain geometry, which is particularly important in high-power cars such as the RS4 B7.

Choosing an original, used driveshaft is a solution that is beneficial both technically and economically – you maintain consistency with the factory Audi design while optimizing the budget for repairs or drivetrain upgrades.

Technical support and further reading

Selecting the right drivetrain component has a direct impact on driving characteristics, especially in all-wheel-drive vehicles. If you want to better understand the relationships between the driveshaft, differential, and axle ratios, it is worth consulting specialized materials. A practical discussion of the topic can be found in the article Dismantled drive axles and differentials – how to choose gear ratios for your driving style, which describes definitions, gear ratio selection, and examples of applications in high-power cars.

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 front shafts, joints, or connecting elements, check the available parts in the Audi Driveshafts category.

For drivers who also pay attention to the ecological and economic aspects of using dismantled parts, the guide Circular economy in your garage – how choosing used parts from dismantling really supports environmental protection and your wallet?, which describes the practical benefits of using used components in vehicle service, may also be helpful.