Audi A4 B8 AdBlue Tank Wiring Harness Loom Cable 8K0971765E

Audi A4 B8 AdBlue Tank Wiring Harness Loom Cable is an original electrical system component for the exhaust emission reduction system, designed for the precise connection of AdBlue tank sub-assemblies in the B8 generation Audi A4. Thanks to its factory design, the harness ensures stable signal transmission and proper power supply to system components, which translates into correct SCR system operation and compliance with emission standards. This solution is dedicated to users who expect reliable fitment and predictable performance without the need for installation modifications.

Specifications and technical data

• SKU: 8K0971765E
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0971765E
• Substitutable numbers: 8K0971765E, 8K0 971 765 E
• Category: Wiring Harnesses, Cables & Connectors

Purpose and function in the AdBlue system

The AdBlue tank wiring harness is responsible for the electrical connection of sensors, the pump, and other tank equipment components to the vehicle's electrical system. A correctly selected harness:

• ensures proper communication with the exhaust treatment system control modules,
• enables stable power supply to actuators,
• reduces the risk of diagnostic errors related to open circuits or interference,
• maintains the factory routing of wires within the AdBlue tank area.

As a result, the SCR system can operate as designed by the manufacturer, and the vehicle maintains emission parameters consistent with the original design specifications.

Construction and fitment for Audi A4 B8

The harness in question belongs to the Wires, harnesses, and connectors group, meaning it is a strictly installation-based component designed to work in the demanding environment of the chassis and the area around the tank. The placement of connectors, cable lengths, and routing methods are adapted to the architecture of the Audi A4 B8, which allows for:

• installation in original mounting points,
• avoidance of wire tension and unwanted kinks,
• maintaining appropriate distances from elements exposed to high temperatures or mechanical damage.

Such fitment promotes trouble-free operation and facilitates potential service work around the AdBlue tank.

Characteristics of the used component

The presented harness is a used part, sourced from dismantling, which represents a reasonable compromise between repair costs and maintaining the original installation design. Choosing an original component from the secondary market allows you to:

• maintain the factory specifications of wires and connectors,
• preserve compatibility with the existing vehicle installation,
• reduce the risk of problems resulting from imprecise fitment of aftermarket replacements.

This solution is particularly beneficial for repairs where maintaining compliance with the factory electrical installation design is crucial.

Application in service practice

Replacing the AdBlue tank wiring harness is recommended, among other situations, when the following occur:

• mechanical damage to insulation or connectors in the tank area,
• intermittent operation of the pump or sensors in the absence of other faults,
• diagnostic errors indicating problems with electrical communication in the AdBlue tank circuit.

Using an original harness dedicated to Audi allows for reduced diagnostic and assembly time, and also facilitates subsequent service of the exhaust emission reduction system.

Support in part selection and related components

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, signal cables, or service connectors, check the available parts in the Audi wires, harnesses, and connectors category.

When selecting elements from the secondary market, it is worth considering different repair strategies. If you are wondering when it is better to choose a used part and when to opt for the regeneration of an existing component, the guide article Refurbished or used original – which part to choose for repairs? may be helpful, as it discusses the practical aspects of both solutions in the context of real automotive repairs.