Audi A5 8T 2.0 TDI CSUB Ad Blue Pump Exhaust Emission Ad Tank Pump 8K0131969E

Audi A5 8T 2.0 TDI CSUB Ad Blue Pump Exhaust Emission Ad Tank Pump is a specialized component from the Secondary air pumps group, responsible for the precise dosing of AdBlue fluid into the exhaust system. The blue housing design facilitates easy identification of the component in the engine bay, and the OEM construction ensures proper integration with the factory emission reduction system in the Audi A5 8T with a 2.0 TDI engine.

Specifications and technical data

• SKU: 8K0131969E
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0131969E
• Substitutable numbers: 8K0131969E, 8K0 131 969 E, 7660148AE, 4077901AE, 8K0 131 357, 8R0 131 975, 8K0131357, 8R0131975
• Color: Blue
• Category: Secondary Air & Smog Pumps

Purpose and function in the exhaust emission system

The described AdBlue pump operates within the diesel engine exhaust treatment system, responsible for transporting and maintaining the correct pressure of the urea solution directed to the SCR catalyst. A properly functioning component of this type stabilizes exhaust system parameters, supports the maintenance of nitrogen oxide emission standards, and reduces the risk of the engine entering limp mode.

Thanks to a design compliant with the vehicle manufacturer's standards, the pump works with the factory engine control unit, temperature sensors, and flow sensors, which translates into predictable system behavior during cold starts, dynamic acceleration, and long-distance highway driving.

Construction, color scheme, and installation aspects

The blue-colored housing allows for quick recognition of the component within the AdBlue installation, which facilitates service and diagnostic work. The used ports and electrical connectors are prepared for compatibility with the factory wiring and hoses in the Audi, which promotes installation without the need for modifications to the system.

The pump is designed to be installed in an existing AdBlue tank or module; therefore, when replacing it, it is recommended to keep the lines clean and check the connections for leaks. Properly performed installation minimizes the risk of air entering the system and ensures stable operating pressure throughout the entire working range.

Benefits of using an original AdBlue pump

Using an OEM component allows for maintaining the factory operating parameters of the emission reduction system, which is important for both the durability of the SCR catalyst and the correct operation of the onboard diagnostic system. Stable AdBlue dosing reduces fluid consumption, lowers the risk of crystallization in the lines, and helps maintain smooth engine operation under full load conditions.

For vehicles used intensively – on long routes or in urban conditions – a functional AdBlue pump supports compliance with technical inspection requirements and limits the appearance of error messages related to the exhaust emission system.

Condition, compatibility verification, and part selection

The item is offered as a used Audi AdBlue pump, which provides a cost-effective solution while maintaining compliance with factory specifications. Before installation, it is recommended to verify compatibility with the specific engine version and vehicle model year, preferably based on catalog data or the vehicle identification number (VIN).

If you are planning a comprehensive repair or upgrade of the exhaust emission system in your Audi and need other components from the same group, such as additional pumps, dosing modules, or secondary air hoses, check the available parts in the Audi Secondary air pumps category.

Operation, diagnostics, and technical knowledge

When replacing the AdBlue pump, it is worth paying attention to the system bleeding procedures and the potential need for adaptation in the engine control unit. Regular inspection of line tightness, fluid quality, and the condition of electrical connectors helps extend the service life of the entire system.

For users interested in deepening their knowledge about the operation of supply systems and dosing of operating fluids in vehicles, an article describing diagnostics and component selection by catalog numbers may be useful: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. In the context of modifications and exhaust system service, it is also worth reading the material dedicated to performance components: Performance exhaust system: used manifolds and sports catalytic converters on the road.