Audi A4 B9 A5 F5 Q5 FY Transfer Box Case 2.0 TFSI DSG 0CJ409431B WARRANTY

Listing details

The gearboxes are sold with a 90-day warranty! They were tested before removal and are in full working order. Audi A4 B9 A5 F5 Q5 FY Transfer Box Case 2.0 TFSI DSG is an original all-wheel-drive system component designed to work with the 2.0 TFSI engine and DSG transmission in selected Audi models. Thanks to its factory design, it ensures consistent torque transfer between the gearbox and the vehicle's axles, which translates into stable handling and predictable vehicle behavior. This solution is dedicated to users who expect compliance with factory specifications and wish to maintain the characteristic performance of the quattro drive system.

Specifications and technical data

• SKU: 0CJ409431B
• Mark: Audi
• Condition: Used
• OEM Part Number: 0CJ409431B
• Substitutable numbers: 0CJ409431B, 0CJ 409 431 B, 0CJ409431G, 0CJ 409 431 G, 0CJ927755, 0CJ 927 755
• Part type: Transfer Case
• Category: Transfer Cases

Purpose and function in the drivetrain

The transfer box in Audi A4 B9, A5 F5, and Q5 FY models with the 2.0 TFSI unit and DSG transmission is responsible for distributing drive between the individual axles of the vehicle. This component works with other drivetrain parts, ensuring:

• efficient torque transfer from the dual-clutch transmission to the drivetrain,
• traction stability during acceleration and engine braking,
• proper cooperation with traction control and electronic stability control systems. By maintaining the original design, the transfer box allows for the preservation of factory drive performance parameters, which is particularly important in vehicles equipped with advanced electronic systems.

Compatibility and selection by VIN/OEM

The presented Audi transfer box is intended for specific 2.0 TFSI drive configurations with a DSG transmission in A4 B9, A5 F5, and Q5 FY platforms. Due to structural differences between individual drive versions, part selection should always be verified by VIN and catalog numbers to ensure full mechanical and electronic compatibility with the vehicle. Proper component matching is crucial for the correct operation of the drivetrain, minimizing vibrations, and avoiding errors in the vehicle's diagnostic systems. In case of doubt, it is worth using professional support when selecting the component.

Characteristics of the used component

The offered transfer box comes from the Transfer boxes category and is a used item, which in practice means a favorable cost-to-functionality ratio while maintaining the manufacturer's original design. This type of solution is particularly attractive for repairs of advanced drivetrain systems, where a new factory component involves very high costs. Before installation, a standard workshop procedure is recommended: checking for leaks, verifying clearances, assessing the condition of connections, and using appropriate operating materials in accordance with the vehicle manufacturer's recommendations. This allows for the safe integration of the component into the existing drivetrain.

Benefits of using an original transfer box

Using an original transfer box in an Audi A4 B9, A5 F5, and Q5 FY provides a number of practical benefits:

• Factory fit – maintaining the geometry of mounts, connections with the DSG transmission, and drive shafts.
• Consistent cooperation with vehicle electronics – proper communication with drive control and stability systems.
• Reduced risk of incompatibility – no need for mechanical modifications or structural adaptations.
• Repair cost optimization – a used OEM component allows for significantly lowering the cost of restoring the drivetrain's efficiency.

Selecting a used transfer box – expert knowledge

When choosing a used drivetrain component, it is worth relying on reliable technical information and selection procedures based on VIN and catalog numbers. A detailed discussion of this topic, along with a cost comparison and a description of common myths regarding used parts, can be found in the article Why it is worth buying used gearboxes and engines – facts instead of myths. This is a practical source of knowledge that helps to consciously plan a drivetrain repair. 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 transfer cases, housings, or related drivetrain components, check the available parts in the Audi transfer boxes category.