The AdBlue SCR injector nozzle for 3.0 TDI engines in Audi A6, A7 4G, and A8 4H is a specialized component of the exhaust gas purification system in diesel-powered vehicles. It is responsible for precisely delivering the AdBlue solution into the exhaust stream, enabling the effective operation of the SCR system and reducing nitrogen oxide emissions.
Specifications and technical data
- SKU: 4H0131113D
- Mark: Audi
- Condition: Used
- OEM Part Number: 4H0131113D
- Substitutable numbers: 4H0131113D, 4H0 131 113 D, 0444025022, 0 444 025 022
- Fuel type: Diesel
- Category: Fuel Injectors
Purpose and Function in the SCR System
The AdBlue injector nozzle for Audi 3.0 TDI works in conjunction with the selective catalytic reduction system, where a urea solution is dosed into hot exhaust gases. Proper atomization of the medium is crucial for the efficient conversion of nitrogen oxides into nitrogen and water vapor, which helps maintain compliance with stringent exhaust emission standards.
This component is installed in the exhaust system section designated by the manufacturer, and its design is tailored to the exhaust gas flow characteristics of Audi's 3.0 TDI diesel engines. This ensures:
- stable AdBlue dosing across a wide range of engine loads,
- proper solution atomization and reduced risk of crystallization,
- maintenance of SCR catalyst efficiency and correct operation of the entire exhaust purification system.
Benefits of Using an Original Injector Nozzle
For SCR systems, maintaining the parameters specified by the vehicle manufacturer is paramount. Using a dedicated AdBlue injector nozzle in Audi diesel engines allows you to:
- minimize the risk of engine control unit errors related to incorrect AdBlue dosing,
- reduce solution consumption through an optimized spray pattern and stable injection performance,
- maintain exhaust system efficiency by ensuring proper interaction with NOx sensors and probes,
- prevent premature wear of the SCR catalyst caused by improper medium atomization.
This solution is particularly important for vehicles used for long-distance travel, where the SCR system operates across a wide range of temperatures and loads, and dosing stability directly impacts component durability.
Technical Characteristics and Compatibility
The presented nozzle belongs to the Injector Nozzles category and is designed for use with compression-ignition engines that utilize an AdBlue solution as an emission-reducing agent. The component's design is adapted to the operating parameters of Audi diesel engines, facilitating integration with the factory exhaust system and electronic control.
The product has assigned part numbers and interchangeable numbers, allowing for precise verification of compatibility with a specific vehicle configuration. Before purchasing, it is advisable to compare the designations with the service documentation or the existing component to ensure full compatibility with your vehicle.
Component Condition and Installation Aspects
The offered AdBlue injector nozzle is a used part, meaning it comes from a previously operated vehicle. Such components are often chosen as an economical alternative to new parts, while still providing the functionality required for the correct operation of the SCR system.
During installation, it is recommended to:
- thoroughly clean the mounting seat in the exhaust system,
- check the tightness of connections for the medium supply lines,
- verify the correct electrical connection if the system includes controller monitoring of the injector's operation.
After replacement, it is advisable to perform a computer diagnostics check to confirm the absence of errors in the control unit's memory and the correct parameter values related to AdBlue dosing.
Technical Support and Additional Materials
If you need other Audi injector nozzles for your car, check the Audi injector nozzles available in our store to select a component tailored to your specific model and engine version.
When diagnosing problems with the fuel system in diesel engines, our guide may be helpful: Diesel Injector Failures – How to Recognize Them and What Neglecting Them Entails, which describes typical symptoms, potential consequences of neglect, and basic methods for verifying component condition.
