BMW X3 G01 X4 G02 Cable Harness Rear Left Right N/O/S Door Wiring Loom 5A49003

BMW X3 G01 X4 G02 Rear Left/Right Door Harness is an original electrical installation component designed for installation in the rear left and right doors. As part of the Wires, Harnesses, and Connectors group, it ensures a stable connection between body modules and door hardware. This is a practical solution for users who want to restore full electrical functionality to their BMW.

Specifications and technical data

• SKU: 5A49005
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 5A49003
• Substitutable numbers: 61125A49005, 5A49005, 5A49003, 61125A49003
• Location on the vehicle: Rear, Right, Left
• Category: Wiring Harnesses, Cables & Connectors

Application and Function in the Vehicle

The presented door harness is specifically designed for BMW X3 G01 and X4 G02 models and operates in the rear left and right door areas. It is responsible for transmitting signals and power between the body's electrical system and the components located within the doors, such as actuators, control units, and other electrical components. This ensures the electrical system in the rear of the vehicle remains cohesive, and individual modules communicate in a predictable and repeatable manner.

Construction and Technical Advantages

This harness belongs to the Wires, Harnesses, and Connectors group, meaning it is factory-matched to the BMW body's geometry and factory mounting points. Appropriately selected wire gauges and integrated connectors minimize the risk of voltage drops and signal interference, which is crucial when working with modern control modules. Using an original harness helps avoid problems typical of universal solutions, such as unreliable contacts or the need for installation modifications.

The component is designed for installation in the rear of the vehicle, on both the left and right sides, facilitating service and potential replacement of both sides in a single operation. This approach helps maintain installation consistency and simplifies future diagnostics.

Benefits of Using an Original BMW Harness

Using a factory door harness in the BMW X3 G01 / X4 G02 offers several practical benefits:

• Secure fit to factory grommets and brackets in the doors and body,
• Preservation of the vehicle's original electrical architecture without additional modifications,
• Cohesive operation with control modules responsible for rear body functions,
• Reduced risk of malfunctions resulting from unprofessional installation repairs.

For users planning to expand or restore the electrical system in their rear doors, choosing such a harness is a way to maintain predictable operation of electrical systems and facilitate future diagnostics.

Product Condition and Installation Aspects

The offered harness is a used part, meaning it comes from a dismantled vehicle and has been previously in use. Such components are often chosen for accident repairs or for restoring functionality after mechanical damage, as they allow for the preservation of the electrical system's original character. Installation involves routing the harness through factory grommets and connecting it to existing connectors in the body and doors, without requiring modifications to the vehicle's structure.

System Expansion and Additional Information

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

For those interested in the broader use of used components, including electrical installation parts for modernization projects or tuning, an article describing a practical approach to selecting such parts may be helpful: Best Used Parts for Tuning Your Car.