Audi S4 B9 S5 F5 3.0 Rear Axle Differential Diff 43:13 QQS 0D3500043 WARRANTY

Listing details

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

Audi S4 B9 S5 F5 3.0 Rear Axle Differential Diff 43:13 QQS is a factory-original rear differential from the Differentials category, designed for the drive axle in Audi sports models with a 3.0 engine. This solution is engineered for stable torque transfer, precise traction, and predictable vehicle behavior during dynamic driving.

Specifications and technical data

• SKU: 0D3500043-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 0D3500043
• Substitutable numbers: 0D3500043, 0D3 500 043
• Location on the vehicle: Rear
• Part type: Differential & Housing Assembly
• Category: Differentials

Purpose and function of the Audi rear differential

The presented rear differential operates within the rear axle drivetrain, responsible for distributing torque between the wheels and ensuring the correct gear ratio. In Audi S4 B9 and S5 F5 3.0 models, it is crucial for:

• maintaining stability during acceleration on straight sections,
• controlled vehicle behavior in corners,
• reducing unwanted wheel slip under high engine power output.

Thanks to the properly selected gear ratio, the differential supports both daily use and a more dynamic driving style, maintaining consistency with the drivetrain characteristics of Audi sports versions.

Benefits of using an original rear differential

Using an original rear differential in an Audi S4 B9 or S5 F5 3.0 allows you to maintain the factory performance parameters of the drivetrain. In practice, this means:

• gear ratio consistency with the factory gearbox and drivetrain configuration,
• proper cooperation with the vehicle's electronic systems (ESP, ABS, traction control),
• predictable car reactions during load and speed changes,
• reduced risk of improper tire wear and drivetrain component damage.

For users who expect repeatable, stable handling parameters from their car, choosing an original differential is a safe and technically sound solution.

Installation and operational characteristics

The differential is designed for installation on the rear axle of the vehicle, replacing the factory drive axle. When selecting and installing, it is worth paying attention to:

• compatibility with the specific Audi S4 B9 or S5 F5 3.0 model version,
• selection of the appropriate transmission oil in accordance with the manufacturer's recommendations,
• checking the condition of mounts, half-shafts, and seals during installation.

A properly selected and correctly installed differential reduces noise, vibrations, and uneven wear of drivetrain components, which translates into more comfortable and predictable operation.

Used condition – a conscious technical choice

The offered component comes from the secondary market, which allows for a significant reduction in the cost of repair or modernization of the drivetrain compared to purchasing a new unit. In the case of differentials for powerful 3.0 engines, this is often the most rational solution, combining:

• original design and fitment for the specific model,
• attractive purchase cost compared to a new part,
• possibility of continued use after proper installation and oil service.

For workshops and individual users, this means real savings while maintaining parameters close to factory specifications.

Gear ratio selection and technical knowledge

When replacing a differential, it is crucial to match the gear ratio to the existing drivetrain configuration and driving style. To better understand the relationships between the drive axle ratio, engine characteristics, and gearbox, it is worth checking out our guide: Dismantled drive axles and differentials – how to choose gear ratios for your driving style. The article discusses definitions, component compatibility, and practical application examples in an accessible, technical way.

If you are planning a comprehensive repair or modernization of your Audi's drivetrain and need other components from the same group, such as front differentials, drive axles, or differential gears, check out the available parts in the Audi Differentials category.