Audi A4 B8 Tail Light Lamp Rear Right O/S Harness Loom Wire 5E5945112A

Audi A4 B8 Tail Light Lamp Rear Right O/S Harness Loom Wire is a practical electrical system component responsible for powering and controlling the right rear lamp in your Audi. Thanks to its factory-fit design for this specific model, it ensures a stable electrical connection and proper operation of the rear lighting. This solution is particularly useful when replacing a damaged wiring harness after a collision, unauthorized modifications, or lighting upgrades.

Specifications and technical data

• SKU: 5E5945112A-2
• Mark: Audi
• Condition: Used
• OEM Part Number: 5E5945112A
• Substitutable numbers: 5E5945112A, 5E5 945 112 A
• Location on the vehicle: Rear, Right
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and vehicle placement

The presented wiring harness is designed to support the right rear lamp in the Audi A4 B8. It is installed in the rear right area of the vehicle, where it is responsible for supplying power and control signals to individual lighting functions (position lights, brake lights, turn signals, reverse lights – depending on the specific lamp configuration used in the car). Due to its dedicated design for the specific Audi model, the harness allows for correct cable routing, proper connector alignment, and minimizes the risk of installation errors that could lead to lighting malfunctions.

Construction and technical function of the harness

The rear lamp wiring harness is the component connecting the vehicle's body electrical system to the lamp itself. It contains appropriately selected wires, insulation, and connectors that enable:

• power transmission to individual lighting circuits,
• a stable connection with the vehicle's control modules,
• reduction of voltage drops and interference in lamp operation,
• easy removal and installation of the rear lamp during service work. An appropriately selected harness is crucial for the trouble-free operation of the rear lighting, as well as for avoiding errors in the vehicle's diagnostic systems, which react to incorrect circuit loads.

Benefits of using an original Audi harness

Using a harness dedicated to the Audi A4 B8 brings a number of practical advantages in daily vehicle operation:

• reliable fit to the electrical system and body structure,
• maintenance of factory cable routing and mounting points,
• reduced risk of overheating, chafing, and short circuits resulting from makeshift repairs,
• easier diagnostics of potential lighting faults in the future. For the user, this means more predictable lighting system performance, which translates into safety and driving comfort, especially in night conditions and during intensive vehicle use.

Application in service and body repairs

The rear lamp wiring harness is often replaced during post-accident repairs, work on the rear body section, or when dealing with intermittent lighting issues. In such situations, using a complete, dedicated harness avoids time-consuming custom connections and soldering, and makes it easier to maintain compliance with Audi's factory electrical diagrams. 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 adapters, check out the available parts in the Other Audi category.

Technical support and Audi project development

For owners of high-performance models or those interested in structural differences between standard and sports versions, a valuable addition to your knowledge may be an article describing the construction of engines, brakes, and chassis in sports variants. More information can be found in the article Audi RS vs other models – what is hidden under the hood and chassis?, which helps to better understand the brand's design philosophy and make informed choices when selecting components for your car.