Audi A8 D4 Adblue Tank Reservoir Bottle 4H0131873A

Audi A8 D4 Adblue Tank Reservoir Bottle is an original component of the AdBlue supply system, belonging to the Fuel tanks and filler pipes category. Designed specifically for the Audi A8 D4 generation, it ensures stable storage of the AdBlue solution and proper integration with the exhaust emission reduction system, which translates into compliance with emission standards and correct engine operation.

Specifications and technical data

• SKU: 4H0131873A
• Mark: Audi
• Condition: Used
• OEM Part Number: 4H0131873A
• Substitutable numbers: 4H0131873A, 4H0 131 873 A
• Category: Fuel Tanks & Filler Necks

Purpose and function in the vehicle

The presented AdBlue tank plays a key role in the exhaust treatment system of the Audi A8 D4, responsible for the safe storage of the urea solution and its stable delivery to the system. A properly functioning tank reduces the risk of SCR system errors, "AdBlue low" warnings, and the engine entering limp mode.

Thanks to its factory origin from Audi, the tank's design is precisely matched to the A8 D4 body, which facilitates installation and ensures proper routing of lines and mounting points. This is a particularly beneficial solution for professional repairs where compliance with the manufacturer's service documentation is essential.

Construction and integration with the supply system

The AdBlue tank in the Audi A8 D4 is a component closely integrated with the nitrogen oxide emission reduction supply system. Its design provides for:

• dedicated geometry matched to the chassis of the luxury sedan,
• compatibility with factory lines and sensors,
• appropriate material resistance to the AdBlue solution and temperature fluctuations.

Such a solution reduces the risk of leaks, venting issues, and incorrect fluid level readings. In practice, this translates into stable operation of the fuel-emission system and lower susceptibility to failures associated with non-original replacements.

Condition, verification, and service application

The item is offered as a used part, which allows for a significant reduction in repair costs compared to a new OEM component, while maintaining factory design and fitment. This type of tank is particularly recommended in situations where the existing component has suffered mechanical damage, external corrosion, or internal contamination resulting in SCR system errors.

In workshops specializing in the Audi brand, the AdBlue tank for the A8 D4 is used both for standard repairs and for comprehensive work on the fuel-emission system, including diagnostics, line cleaning, and checking the correct operation of sensors.

Benefits of using an original AdBlue tank

Choosing an original AdBlue tank for the Audi A8 D4 brings a number of practical advantages:

• Factory fitment – compatibility with the body and supply system design, with no modifications required.
• Stable cooperation with electronics – integration with sensors and vehicle installation as intended by the manufacturer.
• Service savings – a used OEM component allows for reduced repair costs while maintaining high build quality.
• Support for proper SCR system operation – a functional tank minimizes the risk of errors related to AdBlue levels and delivery.

Selection, installation, and technical knowledge

When selecting an AdBlue tank for the Audi A8 D4, it is crucial to verify compatibility with the specific vehicle version and supply system. In workshop practice, manufacturer markings and catalog data are used to avoid installation problems and ensure full compatibility with the existing system.

For mechanics and users wanting to deepen their knowledge about the operation of the fuel system and tanks, an article describing diagnostics, selection by manufacturer markings, and operating principles will be helpful – you can find it here: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.

If you are planning a comprehensive repair or upgrade of the fuel and additive supply and storage area in your Audi and need other elements from the same group, such as tanks, lines, or filler pipes, check out the available parts in the Audi fuel tanks and filler pipes category.