BMW X3 E83 LCI Adapter Lead Interior Lighting Rear Left Right N/O/S 3449920

BMW X3 E83 LCI Adapter Lead Interior Lighting Rear Left Right is an original electrical installation component designed to support interior lighting in the rear cabin of the facelifted BMW X3 model. Thanks to its factory-fit design for this specific model, it ensures consistency with the existing wiring harness and proper operation of the interior lamps. It is a practical solution for replacing a damaged section of the installation or for completing missing components of the interior lighting system.

Specifications and technical data

• SKU: 3449920
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 3449920
• Substitutable numbers: 3449920, 61123449920
• Location on the vehicle: Rear, Right, Left
• Part type: Adapter Plug Connector
• Category: Wiring Harnesses, Cables & Connectors

Purpose and function in the vehicle

The adapter has been designed specifically for the facelifted BMW X3 E83 model as part of the power supply and control system for interior lighting in the rear cabin. It covers both the left and right sides, which facilitates maintaining installation consistency after repairs or modifications. Its placement in the rear area of the vehicle allows for:

• restoring the proper operation of ceiling or side lamps in the rear part of the interior,
• maintaining correct cable routing at factory mounting points,
• reducing the risk of installation errors typical of universal solutions.

Construction and BMW fitment

As a component from the Cables, harnesses, and connectors group, the adapter is prepared to work within the existing BMW electrical system, with appropriately selected connectors and wire gauges. The use of original geometry facilitates installation at factory routing points without the need for modifying the harness or interfering with the interior structure. The connector layout is intended for operation in the rear section, on both the right and left sides of the vehicle, which allows for:

• symmetrical routing of the installation in the cabin,
• easier diagnostics and future servicing,
• maintaining compliance with BMW service documentation.

Practical application and repair scenarios

The interior lighting adapter lead is particularly useful in situations where the factory harness in the rear of the vehicle has been damaged, e.g., after upholstery removal, accessory installation, or interference with the wiring. Using a dedicated adapter reduces the need for soldering and custom connections, which translates into electrical system stability and a lower risk of future malfunctions. This component is also useful when completing missing parts of the installation in cars after modifications or bodywork repairs, where some wires may have been removed or damaged.

Product characteristics and condition

The offered adapter comes from a BMW vehicle and is a used component, meaning it was previously in service but retains the functionality required for continued operation in the interior lighting system. For many users, this represents a favorable compromise between cost and maintaining the manufacturer's original specifications. Using an original lead instead of aftermarket replacements reduces the risk of incorrect connector fitment, improper wire length, or assembly issues within factory routings.

Support for interior upgrades

When upgrading or refreshing the interior of a BMW X3 E83 LCI, properly selected electrical installation components are crucial for the seamless operation of additional light points or the replacement of existing lamps. If you want to plan your cabin modernization more broadly, it is worth checking out tips on selecting interior equipment, installation, and parts compatibility – you can find them in the article Premium interior for half the price: second-hand seats, steering wheels, and multimedia.

Related BMW installation components

If you are planning a comprehensive repair or upgrade of the interior electrical installation zone in your BMW and need other components from the same group, such as additional harness sections, connector adapters, or signal cables, check out the available parts in the BMW cables, harnesses, and connectors category.