Audi A6 C8 AdBlue Additive Urea Reservoir Fuel Tank TDI Diesel 4K0131878G

Audi A6 C8 AdBlue Additive Urea Reservoir Fuel Tank TDI Diesel is a specialized fuel system component designed for diesel engines. It is responsible for the safe storage of urea solution, which is dosed into the exhaust system to reduce nitrogen oxide emissions, supporting the efficient operation of a modern diesel engine and compliance with emission standards. Thanks to its design tailored to the A6 C8 platform, the component integrates seamlessly with the vehicle's factory installation.

Specifications and technical data

• SKU: 4K0131878G
• Mark: Audi
• Condition: Used
• OEM Part Number: 4K0131878G
• Substitutable numbers: 4K0131878G, 4K0 131 878 G
• Fuel type: Diesel
• Part type: Fuel Tank
• Category: Fuel Tanks & Filler Necks

Purpose and function in the fuel system

The described Audi A6 C8 AdBlue Additive Urea Reservoir Fuel Tank TDI Diesel is a part of the Fuel tanks and filler pipes group, working in conjunction with the diesel engine's fuel system. Its task is to provide an adequate reserve of urea solution, which is then delivered to the Selective Catalytic Reduction (SCR) system. A properly functioning reservoir allows for:

• stable supply to the AdBlue exhaust emission reduction system,
• maintenance of correct engine operating parameters,
• reduction of the risk of the engine entering limp mode due to SCR system errors. Thanks to its dedicated design for the specific A6 C8 generation, the reservoir works with the vehicle's factory electrical and fuel installation, which facilitates installation and subsequent operation.

Compatibility with diesel engines

The component has been designed for use with diesel engines that utilize a urea solution injection system for exhaust gases. The appropriate design of the reservoir enables:

• proper routing of the AdBlue system supply lines,
• maintenance of the storage system's seal,
• correct cooperation with sensors and emission reduction system equipment. Selecting a reservoir compatible with the fuel type is crucial for maintaining stable engine operating parameters and avoiding engine control unit errors related to improper additive dosing.

Product characteristics and condition

The presented Audi A6 C8 AdBlue Additive Urea Reservoir Fuel Tank TDI Diesel comes from the Audi brand, which ensures the preservation of factory geometry, mounting points, and compatibility with original equipment. The product is in used condition, which in practice means it was previously operated in a vehicle but is still suitable for further use after proper verification and installation. This type of component is particularly attractive to users looking for a cost-effective solution while maintaining the original design. Before installation, a standard check of the seal, the condition of the connection ports, and a visual assessment of the housing are recommended. A properly selected and functional reservoir allows for the restoration of full AdBlue system functionality without the need to invest in a new part.

Selection support and additional technical information

To ensure that the selected Audi A6 C8 AdBlue Additive Urea Reservoir Fuel Tank TDI Diesel will be fully compatible with your Audi A6 C8, it is worth verifying compatibility using catalog numbers and the vehicle configuration. A detailed guide on verifying fuel system components may be helpful – you can find it in the article Fuel dosing problems – how to safely choose used fuel system components, which discusses the practical aspects of purchasing dismantled parts. If you would like to further deepen your knowledge on checking part compatibility using OEM numbers, methods of verifying components, and minimizing risks when shopping online, the guide how to safely verify parts by OEM numbers when shopping online, which describes the compatibility checking process step-by-step, will be helpful.

Expanding the Audi fuel system – related components

If you are planning a comprehensive repair or upgrade of the fuel supply and storage area in your Audi and need other elements from the same group, such as filler pipes, additional tanks, or mounting elements, check the available parts in the Audi fuel tanks and filler pipes category. Well-chosen components from the same group allow for maintaining structural consistency, facilitate installation, and reduce the risk of leaks or errors in the fuel system's operation, which translates into stable vehicle operation in daily use.