Audi Q3 RSQ3 F3 Rear Tail Light Lamp LED Right O/S Harness Wire Loom 83A945094D

Audi Q3 RSQ3 F3 Rear Tail Light Lamp LED Right O/S Harness Wire Loom is an original electrical installation component designed to support the right rear LED tail light in Audi Q3 and RSQ3 F3 generation models. Thanks to its factory-spec design, it ensures stable power supply and correct control of lighting functions, which translates into safety and compliance with homologation requirements. It is a practical solution for post-collision repairs, upgrading to LED tail lights, or resolving wiring faults in the rear section of the vehicle.

Specifications and technical data

• SKU: 83A945094D-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 83A945094D
• Substitutable numbers: 83A945094D, 83A 945 094 D
• Location on the vehicle: Rear, Right
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and function in the vehicle

The right-side rear LED tail light wiring harness is responsible for connecting the control modules to the tail light, covering power supply and control signals for individual lighting functions. Its location in the rear right area of the vehicle means the component operates in a zone exposed to vibrations, temperature changes, and moisture, which is why using an original harness is crucial for system reliability.

In practice, this component is particularly important for:

• repairing the installation after mechanical damage or connector corrosion,
• replacing or retrofitting the right rear LED tail light,
• diagnosing lighting errors in Audi onboard systems.

Advantages of using an original Audi harness

Using a factory wiring harness in the Audi Q3 / RSQ3 F3 allows for maintaining full electrical and mechanical compatibility with the vehicle's factory wiring. Properly selected wire gauges, correct length, and factory connectors minimize the risk of voltage drops, contact overheating, or communication errors in the lighting system.

Key benefits include:

• reliable connection to the LED tail light without the need for installation modifications,
• maintaining correct operation of position lights, brake lights, turn signals, and reversing lights (according to the specific lamp configuration),
• easier fault diagnostics due to the preservation of the original wiring layout.

Product characteristics and installation

The harness is a component of the body electrical installation group, prepared for operation in the rear part of the car. The design intended for the right side of the vehicle facilitates routing the wiring according to factory mounting points, which limits the risk of chafing and mechanical damage during operation.

During installation, it is worth paying attention to:

• correct routing of the harness in original holders and grommets,
• precise seating of connectors in the lamp and the vehicle's installation,
• checking the tightness of connections in areas exposed to moisture.

The product comes from the Other group, which means it is an auxiliary installation element, but it directly affects the proper operation of external lighting and daily driving comfort.

Condition and service application

The offered harness is a used component, making it an attractive solution for accident repairs or vehicle servicing where cost optimization is a priority while maintaining the original design. In practice, it will work well both in professional services specializing in the Audi brand and in independent workshops performing electrical system repairs in modern vehicles.

Thanks to the preservation of factory geometry and connectors, the installation proceeds in a manner similar to the manufacturer's procedures, which facilitates maintaining a high standard of repair and reduces the time required to fit the component.

System expansion and technical knowledge

If you are planning a comprehensive repair or upgrade of the rear lighting zone in your Audi and need other elements from the same group, such as additional harnesses, connectors, or control modules, check the available parts in the Other Audi category.

For users interested in a broader technical context of high-performance models, including the RSQ3, an article discussing the structural differences between sports versions and standard ones may be useful, available at the link: Audi RS vs other models – what is hidden under the hood and chassis?.