Ford Focus Mk3 Rear Tail Light Lamp Wiring Loom Harness Right O/S BM51-13404-AK

Ford Focus Mk3 Rear Tail Light Lamp Wiring Loom Harness Right O/S is an original electrical installation component designed to support the right rear tail light in this model. Thanks to its factory design, the wiring harness ensures a stable electrical connection and proper lighting operation without the need for any modifications to the installation. It is a practical solution for repairs following a collision, connector damage, or rear lighting upgrades.

Specifications and technical data

• SKU: 1825318-2
• Mark: Ford
• Condition: Used
• OEM Part Number: 1825318
• Substitutable numbers: 1825318, BM51-13404-AK, BM5113404AK
• Location on the vehicle: Rear, Right
• Part type: Wire Harness
• Category: Wiring Harnesses, Cables & Connectors

Purpose and function in the vehicle

The presented wiring harness is a component from the Wires, harnesses, and connectors group, specifically designed to work with the right rear tail light in the Ford Focus Mk3. It is responsible for transmitting signals from the vehicle's electrical system to individual lamp functions, such as position lights, turn signals, or brake lights, in accordance with the configuration used in a given vehicle. The vehicle placement, defined as rear – right side, allows for clear identification of the installation area and reduces the risk of errors when selecting the part. As a result, the harness is a convenient choice when replacing a damaged section of the installation within the right rear tail light area.

Construction and advantages of the original harness

The tail light wiring harness is constructed as a complete connection between the body installation and the right tail light. The connectors used are matched to the factory sockets in the lamp and the bodywork, which enables a plug-and-play style installation without the need for soldering or creating custom adapters.

• Factory connectors matched to the Ford Focus Mk3.
• Wires routed in an organized manner, facilitating installation in the trunk area.
• A solution consistent with the vehicle's original electrical architecture. By maintaining the original geometry of the harness, the risk of wire chafing, accidental stretching, or interference with trunk upholstery elements is minimized.

Condition of the component and service application

The offered harness is an aftermarket component, making it an attractive cost-effective alternative to new parts while maintaining the original manufacturer's specifications. It is particularly useful in situations where there has been:

• damage to wires as a result of corrosion or chafing,
• failure of the connector at the lamp after disassembly or a collision,
• body and paint repairs in the rear part of the vehicle. The selection of the correct harness for a specific version of the Ford Focus Mk3 should always be confirmed based on the vehicle's technical data and the part numbers visible in the product specification.

Benefits of using an original Ford harness

Using an original wiring harness in a Ford Focus Mk3 allows for maintaining the consistency of the electrical installation and limiting potential diagnostic problems. A correctly selected component:

• facilitates quick installation without modifying the existing wiring,
• ensures the proper operation of all functions of the right rear tail light,
• reduces the risk of errors in lighting control systems. For workshops and individual users, this means shorter repair times and greater predictability of the service outcome.

Related products and technical knowledge

If you are planning a comprehensive repair or upgrade of the rear lighting zone in your Ford and need other elements from the same group, such as additional harnesses, wire sections, or lamp connectors, check the available parts in the Ford Wires, harnesses, and connectors category. If you are interested in a broader context regarding the use of aftermarket components and want to better understand why original used parts are becoming an increasingly popular service choice, it is worth reading the article Crisis in the new parts market? Why used originals for premium cars are the hottest trend in 2026, which discusses current trends and a practical approach to vehicle repairs.