Audi Q3 8U 2.0 TDI Quattro Rear Axle Differential Haldex QLY 0AY525010N WARRANTY

Listing details

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

Audi Q3 8U 2.0 TDI Quattro Rear Axle Differential Haldex QLY is an original drivetrain component designed for the rear axle of a four-wheel-drive vehicle. Thanks to the use of a Haldex clutch, it ensures stable torque distribution between the axles, which translates into predictable handling and safe traction in everyday use. This solution is dedicated to the diesel engine and automatic transmission, allowing for the preservation of the factory drivetrain performance characteristics.

Specifications and technical data

• SKU: 0AY525010N-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 0AY525010N
• Substitutable numbers: 0AY525010N, 0AY 525 010 N
• Location on the vehicle: Rear
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: Differentials

Purpose and function in the drivetrain

The presented rear Haldex differential operates within the Quattro four-wheel-drive system, responsible for precise power transmission to the rear axle and compensation for wheel speed differences. Combined with a diesel engine and an automatic transmission, it creates a cohesive, optimized set that ensures smooth acceleration, predictable behavior on slippery surfaces, and comfortable driving both on the highway and in the city.

A differential of this type is a key element for the proper operation of the four-wheel-drive system – its correct performance affects:

• vehicle stability during acceleration and engine braking,
• traction maintenance on wet, snowy, or uneven surfaces,
• even load distribution on drivetrain components.

Application in Audi Q3 8U 2.0 TDI Quattro

The differential has been designed to work with the diesel unit and automatic transmission, which allows for maintaining factory drivetrain operating parameters. Installation in the correct model and drivetrain version enables the restoration of proper Quattro system operation without the need for structural modifications.

The component is mounted in the rear part of the vehicle, on the rear axle, where it works with the half-shafts and other drivetrain components. A correctly selected differential reduces the risk of improper torque distribution, vibrations, or excessive tire wear.

Product characteristics and condition

The offered differential comes from the Differentials group and is an original Audi part, which means it complies with factory design standards. As a used part, it is a cost-effective solution for drivetrain repairs, allowing for the restoration of vehicle efficiency while maintaining appropriate build quality.

Choosing an original differential from disassembly is particularly important in the case of advanced four-wheel-drive systems, where matching the specific engine configuration, transmission, and electronic control is crucial.

Differential selection and technical aspects

To ensure proper drivetrain operation, the differential must be selected based on gear ratios, fuel type, transmission type, and vehicle placement. In practice, this means verifying compatibility with the specific version of the Audi Q3 8U 2.0 TDI Quattro to maintain consistency with factory software and Haldex operating characteristics.

If you want to better understand how to choose the right drive axle and differential for your driving style and car configuration, it is worth checking out the guide article Drive axles and differentials from disassembly – how to choose gear ratios for your driving style, which discusses issues of gear ratios, compatibility, and practical application examples.

Drivetrain expansion in Audi

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 additional differentials, drive axles, or related components, check out the available parts in the Audi Differentials category.