Audi A3 8V Q2 GA VW Golf CD AdBlue Tank Wiring Harness Cable 1.6 TDI 5Q0971405

Audi A3 8V Q2 GA VW Golf CD AdBlue Tank Wiring Harness Cable 1.6 TDI 5Q0971405 is an original electrical installation component designed to support the AdBlue system in Audi Q2 models with a 1.6 TDI engine. Thanks to its factory design, the harness ensures proper connection of sensors, the pump, and AdBlue tank accessories, which translates into stable operation of the exhaust emission reduction system. It is a practical solution for SCR system repairs when it is necessary to replace a damaged or corroded wiring installation.

Specifications and technical data

• SKU: 5Q0971405
• Mark: Audi
• Condition: Used
• OEM Part Number: 5Q0971405
• Substitutable numbers: 5Q0971405, 5Q0 971 405
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and function in the AdBlue system

The AdBlue tank wiring harness in the Audi Q2 GA is responsible for transmitting electrical signals between the control module and the tank accessory components. This includes, among other things, powering the pump, communicating with level and temperature sensors, and other components responsible for the correct dosing of the AdBlue solution into the exhaust system.

A functional harness is crucial for:

• maintaining the correct operation of the SCR system and meeting exhaust emission standards,
• stable communication with the engine electronics,
• eliminating AdBlue-related errors appearing on the dashboard.

Benefits of using an original Audi harness

Using a factory wiring harness in the Audi Q2 GA provides a number of practical advantages compared to "quick fix" repairs or universal replacements. The original design guarantees:

• precise fit of length and connectors to the AdBlue tank and mounting points on the chassis,
• compatibility with the 1.6 TDI version's electrical installation,
• preservation of the factory cable routing, which reduces the risk of chafing and mechanical damage.

As a result, the installation process is orderly, and the system remains consistent with the vehicle manufacturer's specifications.

Component condition and service application

The offered wiring harness comes from the group of used Audi parts, which allows for an economical repair of the AdBlue system while maintaining the original specification. This solution is particularly useful in situations where:

• mechanical damage to the wires near the tank has occurred,
• corrosion of connectors or insulation has appeared,
• diagnostics indicate circuit breaks or signal interference in the AdBlue installation.

Replacing the complete harness is often faster and more predictable than spot soldering or fabricating sections of wiring, which limits the risk of future failures.

Professional installation and diagnostics

To fully utilize the potential of this harness in the Audi Q2 GA 1.6 TDI, it is recommended to entrust the installation to a workshop experienced with AdBlue systems and SCR systems. Proper installation includes:

• checking the condition of connectors on the vehicle and tank side,
• routing the wires according to the factory path,
• electrical continuity testing and reading controller errors after installation.

Such an approach minimizes the risk of recurring faults and allows for the quick restoration of full functionality of the exhaust emission reduction system.

If you are planning a comprehensive repair or upgrade of the AdBlue electrical system area in your Audi and need other elements from the same group, such as additional harnesses, connectors, or service wire sections, check the available parts in the Other Audi category.

For drivers interested in a broader look at technical solutions used in the brand's sports versions, including differences in engine, brake, and chassis construction, the article Audi RS vs other models – what is hidden under the hood and chassis? will be helpful, allowing for a better understanding of Audi's engineering philosophy and making informed choices when selecting spare parts.