BMW 5 Series E60 E61 LCI Right/Left Rear Door Wiring Loom 9120798 N/O/S

BMW 5 Series E60/E61 LCI Rear Door Harness is an original electrical installation component designed for installation in the rear left or right door. As part of the Cables, Harnesses, and Connectors group, it ensures proper signal and power routing between the door and the body, supporting the correct operation of electrical equipment. This used BMW OEM component allows for a technically correct repair without the need for installation modifications.

Specifications and technical data

• SKU: 9120798
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9120798
• Substitutable numbers: 61129120828, 9120828, 9120798, 9120720
• Location on the vehicle: Rear
• Category: Wiring Harnesses, Cables & Connectors

Purpose and Function in the BMW 5 Series Electrical System

This harness is specifically designed for the facelifted (LCI) BMW 5 Series models of the E60/E61 generation and operates within the rear door area. It is responsible for a stable electrical connection between the door and the car body, enabling the proper functioning of elements such as window controls, central locking, and door lighting – in accordance with the specific vehicle's factory configuration.

Thanks to its dedicated fitment for the specific BMW platform, the harness maintains the correct length, connector layout, and wire routing, which simplifies installation and reduces the risk of mechanical stress in the door grommets.

Construction, Connectors, and Installation Compatibility

This item belongs to the Cables, Harnesses, and Connectors group, meaning it includes factory-prepared wires with appropriate terminals and connectors for the BMW installation. The harness's construction is adapted for use in the moving area of the rear doors, where wires are exposed to repeated bending during door opening and closing.

The connector layout conforms to the original manufacturer's design, allowing for plug-in installation into existing vehicle system sockets. The absence of soldering or custom wire fabrication helps maintain electrical integrity and minimizes the risk of installation errors.

Application in the Rear of the Vehicle

Its placement in the rear door area of the vehicle means the harness operates in a zone particularly susceptible to damage from door movement and weather conditions. Using an original BMW part helps restore correct electrical system functionality in cases of chafed wires, broken connections, or communication issues with door modules.

The harness can be used on both the left and right sides, in accordance with the E60/E61 LCI model design, which simplifies part selection for repairs to the rear body electrical system.

Benefits of Using an Original BMW Harness

• Factory fitment for the BMW 5 Series E60/E61 LCI in the rear door area.
• Appropriately selected wire and connector geometry, facilitating installation in original mounting points.
• Reduced risk of electrical errors by maintaining the OEM installation structure.
• Ability to restore correct operation of electrical equipment in the rear doors without interfering with the main body harness.

Integration with Other BMW Electrical Components

When repairing the electrical system in the rear doors, it is advisable to consider this harness as part of the vehicle's larger electrical system. Proper connection to control modules and other body wiring ensures communication integrity within the vehicle network and avoids diagnostic issues.

If you are planning a comprehensive repair or upgrade of the rear door electrical system in your BMW and require other components from the same group, such as additional wire sections, connectors, or transition harnesses, check the available parts in the BMW Cables, Harnesses, and Connectors category.

Summary and Technical Tips

The BMW 5 Series E60 E61 LCI Rear Door Harness is a practical solution for owners and workshops looking to restore correct electrical functionality in the rear doors without using aftermarket alternatives of uncertain fitment. A used OEM part helps maintain the original installation routing, which is important for both reliability and subsequent service diagnostics.

For those interested in a broader context of selecting original components in the group's vehicles, an article discussing construction differences and the importance of OEM parts may be helpful: Classic Mini vs. Modern MINI – How Construction Has Changed and Which Original Mini Parts Help Preserve Their Character.