Audi A5 8T 3.0 TDI Quattro Rear Axle Differential Diff JKQ 0BC500043A WARRANTY

Listing details

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

Audi A5 8T 3.0 TDI Quattro Rear Axle Differential Diff JKQ is an original drivetrain component from the Differentials category, designed for rear axle installation in quattro all-wheel-drive systems. This used rear axle differential provides a functional solution for demanding users who expect factory-spec drivetrain geometry and compatibility with other chassis components. It is a practical choice for repairs following mechanical damage or when a worn-out differential needs replacement.

Specifications and technical data

• SKU: 0BC500043A-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 0BC500043A
• Substitutable numbers: 0BC500043A, 0BC 500 043 A
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function of the rear axle

The presented rear axle with differential has been designed specifically for Audi models with all-wheel drive, where it is responsible for stable torque transfer to the rear axle. Its rear-mounted position ensures proper cooperation with the driveshaft and axle shafts, which translates into predictable vehicle behavior during cornering and acceleration.

The differential in this assembly allows for wheel speed variation, which is crucial for traction in the quattro system. As a result, the drivetrain maintains proper grip on both dry asphalt and surfaces with lower traction, supporting safe and comfortable driving.

Benefits of using an original differential

Using a complete rear axle with differential dedicated to the Audi A5 8T 3.0 TDI Quattro allows you to maintain factory gear ratios and drivetrain performance characteristics. The original design ensures proper fitment with suspension and drivetrain components, which reduces the risk of incorrect installation and unwanted vibrations.

A used component of this class is a reasonable compromise between cost and functionality – especially in the case of post-accident repairs or differential failure resulting from wear and tear. Maintaining compliance with factory parameters is important not only for durability but also for the operation of assistance systems, such as traction control or electronic stability control.

Application in the quattro drivetrain

The rear axle with differential in the Audi A5 8T 3.0 TDI Quattro works with other drivetrain elements to create a cohesive power distribution system. A correctly selected rear differential contributes to:

• even load distribution between the axles,
• vehicle stability at higher speeds,
• smooth torque transfer to the rear wheels,
• reduction of excessive tire and suspension component wear.

Thanks to this, the driver receives predictable handling characteristics, consistent with Audi's design specifications for the quattro system in this model.

Component condition and installation aspects

The offered rear axle with differential is a used component, meaning it has been removed from a vehicle and was previously in operation. This type of component is particularly attractive for repairs where maintaining the original design while reducing costs is a priority. Before installation, standard workshop verification and a differential oil change in accordance with service procedures are recommended.

The completeness of the rear axle assembly facilitates the mechanic's work – installation takes place in the location provided by the manufacturer, using factory mounting points. This allows for shorter repair times and limits the need for additional modifications.

Gear ratio selection and additional technical materials

When replacing a differential in an Audi with quattro drive, it is crucial to match the gear ratios to the engine version and transmission. Proper selection affects dynamics, fuel consumption, and cooperation with the vehicle's electronics. To better understand the relationships between gear ratios, driving style, and axle construction, it is worth checking out our guide: Dismantled drive axles and differentials – how to choose gear ratios for your driving style.

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 other differentials, drive axles, or complete rear-drive assemblies, check out the available parts in the Audi Differentials category.