Audi Q3 F3 AdBlue Tank Reservoir Pump 2.0 TDI 5QF131877N

The Audi Q3 F3 AdBlue Tank Reservoir Pump 2.0 TDI is an original component of the AdBlue supply system, belonging to the Fuel Tank and Filler Neck Components group. Designed for Audi Q3 F3 2.0 TDI diesel engines, it ensures precise delivery of the AdBlue solution to the exhaust gas purification system, contributing to stable engine operation and compliance with emission standards. A used OEM component is a sensible choice for drivers seeking factory fitment and predictable performance parameters.

Specifications and technical data

• SKU: 5QF131877N
• Mark: Audi
• Condition: Used
• OEM Part Number: 5QF131877N
• Substitutable numbers: 5QF131877N, 5QF 131 877 N, 0444040022, 0 444 040 022
• Part type: Auxillary Fuel Tank
• Category: Fuel Tanks & Filler Necks

Purpose and Function in the AdBlue System

The AdBlue tank pump in the Audi Q3 F3 is responsible for transporting the urea solution from the tank to the dosing system, working in conjunction with the 2.0 TDI engine control electronics. A properly functioning module guarantees:

• stable pressure in the AdBlue circuit,
• precise dosing of the additive into the exhaust,
• maintenance of SCR catalyst efficiency,
• reduction of the risk of the engine entering limp mode.

By using an original Audi solution, full compatibility with the factory exhaust gas purification system's operating characteristics is maintained.

Construction and Advantages of the Original Audi Component

The AdBlue tank pump presented is an OEM part, meaning it was specifically designed to work with the Q3 F3 platform and the 2.0 TDI engine. In practice, this translates to:

• precise mounting fit to the factory tank and installation,
• compatibility with original electrical connectors and hoses,
• maintenance of operating parameters specified by the vehicle manufacturer.

Compared to unreliable aftermarket alternatives, a used OEM part helps reduce the risk of communication issues with the engine control unit and errors in the exhaust gas purification system.

Condition, Verification, and Selection by Part Numbers

The offered AdBlue tank pump is a used component, which in the segment of OEM parts for modern diesels often represents a favorable compromise between cost and quality. Before installation, standard diagnostics of the vehicle's AdBlue system are recommended to rule out additional faults in the hoses, sensors, or control unit.

The selection of this pump for a specific Audi Q3 F3 should be based on the OEM part number and interchangeable part numbers – this helps confirm compatibility with the year of manufacture, engine version, and equipment configuration. If in doubt, it is helpful to compare the markings with the removed part or verify using the VIN in the manufacturer's catalog.

Integration with the Fuel and AdBlue System

Although the AdBlue tank pump belongs to the Fuel Tank and Filler Neck Components group, it actually operates in a separate exhaust additive circuit. Its efficiency directly impacts:

• the correct operation of the fuel system in terms of injection strategy,
• maintaining low nitrogen oxide emissions,
• the absence of AdBlue error messages on the dashboard.

For a more complete understanding of the pump's, tank's, and other components' cooperation, it is advisable to consult technical materials regarding the fuel supply system and operational additives.

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 the tank, filler neck hoses, or auxiliary modules, check the available parts in the Audi Fuel Tank and Filler Neck Components category.

Operation, Diagnostics, and Technical Knowledge

To maximize the lifespan of the AdBlue tank pump, it is recommended to use only certified AdBlue solution, avoid contamination during refueling, and regularly check the vehicle's diagnostic messages. In case of errors related to pressure or flow in the AdBlue system, correct interpretation of fault codes and verification of the pump, sensors, and hoses are crucial.

For users who want to better understand the relationships between the tank, pump, and the rest of the supply system, a guide describing the construction and servicing of the entire fuel line – from the tank to the dosing elements – will be useful. A detailed discussion can be found in the article Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair.