BMW G30 G31 Rear Door Wiring Loom Harness Cable Right O/S 8730190

BMW G30 G31 Rear Door Wiring Loom Harness Cable Right O/S is an original electrical installation component designed for the rear right door of the 5 Series G30/G31 models. Thanks to its factory-spec design, it ensures proper electrical signal routing between the door and the body, which translates into stable operation of the door equipment. This is a solution for users who want to restore full door electrical functionality without compromising on fitment.

Specifications and technical data

• SKU: 8730190
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8730190
• Substitutable numbers: 8730190
• Location on the vehicle: Rear, Right
• Category: Wiring Harnesses, Cables & Connectors

Purpose and function in the BMW G30/G31 electrical system

The presented wiring harness belongs to the Wires, harnesses, and connectors category and is dedicated to installation in the rear right door of the vehicle. It is responsible for connecting the modules and receivers located in the door to the main body harness, enabling power supply and transmission of control signals for components such as actuators, switches, or interior and puddle lighting.

The vehicle placement specified as rear – right side allows for unambiguous identification of the installation area and reduces the risk of errors when selecting the part for a specific position in the body. As a result, the harness can be plugged into existing connectors without the need for modifying the installation.

Advantages of using an original BMW wiring harness

Using a factory wiring harness in the rear right door offers a number of practical technical benefits:

• Full compatibility with the BMW installation – connectors, wire lengths, and pin layouts are adapted to the G30/G31 electrical architecture.
• Stable electrical connections – the correct wire cross-section and matched plugs reduce voltage drops and signal interference.
• Simplified service installation – the harness is prepared for mounting in factory routing points, which shortens work time and reduces the risk of errors.
• Consistency with safety and comfort systems – functions dependent on communication between the door and the body operate correctly.

For users and workshops, this means the ability to restore the efficiency of the door electrics in accordance with the manufacturer's specifications, without the need for adaptations or universal replacements.

Installation characteristics and area of application

The harness has been designed specifically for the rear right door, which translates into the appropriate shaping of the wires and the arrangement of connectors. This facilitates routing the installation through the grommets between the pillar and the door, as well as within the internal structure of the door shell. This makes it possible to maintain the proper bending radius of the wires and minimize stress during door opening and closing.

The component will work well both when replacing a damaged harness (e.g., after abrasion in the grommet or mechanical interference) and during modernization work, when it is necessary to bring the original installation to the door to maintain compliance with the factory electrical diagram.

Product condition and service application

The offered wiring harness comes from the used parts group, making it an attractive cost-effective solution while maintaining original BMW specifications. For workshops specializing in the BMW brand and for conscious users, this is a practical way to repair the door installation without sacrificing factory quality and fitment.

Choosing this type of component is particularly beneficial for accident repairs, door replacements, or damage resulting from wear and tear, where it is crucial to maintain the proper operation of electrical and electronic systems within the rear right side of the vehicle.

Expanding the electrical installation in a BMW – related items

If you are planning a comprehensive repair or modernization of the door zone in your BMW and need other elements from the same group, such as additional harnesses, wires, or connectors, check the available parts in the BMW wires, harnesses, and connectors category.

If you are interested in a broader context of using used electrical installation components when refreshing older models, it is worth reading the practical tips described in the article The second life of a youngtimer – how used car parts rejuvenate cars from 1998–2012, which discusses modernization scenarios and component selection in vehicles of popular brands.