Audi Q7 4M 3.0 TDI Rear Axle Differential Ratio 43:13 RZP 0G2500043B WARRANTY

Listing details

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

Audi Q7 4M 3.0 TDI Rear Axle Differential Ratio 43:13 RZP is a factory-original drivetrain component designed for the rear axle of this model. Its original construction ensures proper torque transfer, stable handling, and predictable vehicle behavior in various road conditions. This is a solution for users who expect consistency with factory specifications and wish to maintain the driving characteristics of their Audi.

Specifications and technical data

• SKU: 0G2500043B
• Mark: Audi
• Condition: Used
• OEM Part Number: 0G2500043B
• Substitutable numbers: 0G2500043B, 0G2 500 043 B
• Location on the vehicle: Rear
• Part type: Differential & Housing Assembly
• Category: Differentials

Purpose and function of the rear differential

The presented rear differential is a component from the Differentials category, responsible for distributing power to the rear axle wheels in the Audi Q7 4M with a 3.0 TDI engine. The properly selected 43:13 gear ratio influences acceleration characteristics, drivetrain refinement, and driving comfort at higher speeds. Using the correct differential allows for proper interaction with other drivetrain components, including the transmission and the all-wheel-drive control system.

Construction and performance parameters

The rear differential in the Audi Q7 4M 3.0 TDI is designed as a gear unit operating in the rear axle, featuring a precisely matched set of gears and a housing adapted for operation under demanding load conditions. The construction ensures:

• stable transfer of high torque typical for the 3.0 TDI unit,
• proper refinement under continuous and transient loads,
• consistency with the factory suspension system and rear axle mounts.

By maintaining the original geometry and gear ratio, the differential supports the correct operation of driver assistance systems, such as traction control or electronic stability control, which translates into confident vehicle handling.

Vehicle application and installation aspects

The component is intended for installation in the rear of the vehicle, within the drive axle of the Audi Q7 4M 3.0 TDI. Its placement in the rear drive axle area allows for direct interaction with the half-shafts and other drivetrain components. In practice, this means it can be used as a replacement for the factory-installed differential, while maintaining structural and functional compatibility.

When selecting this component, it is crucial to match it to the specific drivetrain version and vehicle configuration so that the gear ratio and differential type correspond to factory parameters. Proper selection helps avoid drivetrain malfunctions, such as axle rotational speed discrepancies or incorrect operation of electronic systems.

Characteristics of the used product

The offered rear differential is a used component sourced from dismantling, which allows for an economical restoration of the drivetrain's efficiency while maintaining the manufacturer's original specifications. Such components are a preferred choice in situations where the priority is maintaining the factory design and compatibility with existing vehicle elements, while simultaneously optimizing repair costs.

Choosing an original differential from dismantling is particularly beneficial for premium-class models, where precision engineering and compatibility with electronic systems have a direct impact on driving comfort and the durability of the entire drivetrain.

Gear ratio selection and technical knowledge

When replacing a differential, it is crucial to match the gear ratio to the specific drivetrain version and driving style. Proper selection affects acceleration dynamics, engine RPM at highway speeds, and the overall performance characteristics of the drivetrain. To better understand the relationships between the drive axle ratio, the differential, and vehicle behavior, it is worth consulting this specialized article: Dismantled drive axles and differentials – how to choose gear ratios for your driving style.

Related Audi drivetrain components

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 transmission components, check out the available parts in the Audi Differentials category.