Audi Q5 FY AdBlue Additive Tank Reservoir Container Module 80A131878AR

The Audi Q5 FY AdBlue Additive Tank is an original Audi module designed for the AdBlue supply system in modern diesel engines. This component belongs to the Fuel Tanks and Filler Necks group and is a key part responsible for the safe storage and delivery of the AdBlue solution to the exhaust gas purification system.

Specifications and technical data

• SKU: 80A131878AR
• Mark: Audi
• Condition: Used
• OEM Part Number: 80A131878AR
• Substitutable numbers: 80A131878AR, 80A 131 878 AR, 80A 131 969 S, 80A131969S
• Category: Fuel Tanks & Filler Necks

Purpose and Function in the AdBlue System

The AdBlue additive tank module in the Audi Q5 FY is responsible for storing the nitrogen oxide reducing medium and for cooperating with the dosing system and engine control unit. A properly functioning tank ensures stable pressure and correct operating conditions for the SCR system, which translates to compliance with emission standards and proper engine operation.

Thanks to its factory OEM design, the tank is tailored for installation in the Audi Q5 FY chassis, with appropriately positioned connectors, mounting points, and connections to the vehicle's fuel and emission system.

Module Construction and Advantages of the Original Solution

The original Audi AdBlue tank module has been designed for resistance to urea solution and variable temperature conditions. The construction material and seals used are selected to minimize the risk of leaks, medium crystallization, and leakage over a long service life.

Compared to aftermarket alternatives, the original AdBlue additive tank ensures:

• full compatibility with the factory installation of the Audi Q5 FY,
• correct positioning of sensors and connectors,
• stable cooperation with the SCR system's control electronics.

Condition, Verification, and Preparation for Installation

This item is from a disassembly and is offered as a used OEM module. This type of part allows for economical repair of the AdBlue system while maintaining the original manufacturer's specifications. Before installation, a standard check of tightness, the condition of connectors and electrical connections is recommended, as well as verification of the system's correct operation after installation (computer diagnostics, clearing any errors).

The selection of the tank for a specific Audi Q5 FY version should always be confirmed based on the OEM number or the vehicle's VIN, which minimizes the risk of structural incompatibility and installation problems.

Benefits of Using an Original AdBlue Tank

Using an original AdBlue additive tank module in the Audi Q5 FY allows for the restoration of correct exhaust emission reduction system operation, reduces the risk of the engine entering limp-home mode, and avoids AdBlue system error messages on the instrument cluster. This solution is particularly beneficial in vehicles used intensively, where the stability of the SCR system's operation directly impacts reliability and operating costs.

If you are planning a comprehensive repair or upgrade of the fuel and AdBlue supply area in your Audi and need other components from the same group, such as filler necks, additional tanks, or auxiliary modules, check the available parts in the Audi Fuel Tanks and Filler Necks category.

Selection by OEM/VIN and Technical Knowledge

To correctly select the AdBlue additive tank for a specific engine configuration and year of the Audi Q5 FY, it is advisable to use service documentation and computer diagnostics. Comparing the construction of the disassembled component with the offered module is also helpful, especially regarding the arrangement of connectors and mounting points.

For users and mechanics who want to deepen their knowledge of the fuel supply system's construction and operation, an article describing the operation of the entire fuel line and tank will be useful, available here: Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair.

The choice of a used, original AdBlue additive tank also aligns with an approach that reduces waste and service costs – you can find more on this topic in the material: Circular Economy in Your Garage – How Choosing Used Parts from Disassembly Supports the Environment and Your Budget.