Plug Socket BMW E90 LCI Saloon Light In The Side Panel Left N/S Wiring 6984754

BMW E90 LCI Rear Left Side Lamp Wiring Harness 6984754 is an original electrical system component designed for the rear left side lamp in facelifted BMW 3 Series models. Thanks to its factory fit, the harness ensures a stable electrical connection and proper operation of the brake and position lights. It's a practical solution for collision repairs, lamp replacements, or damage to the original wiring.

Specifications and technical data

• SKU: 7289425-5
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7289425
• Substitutable numbers: 7289425, 63217289425, 4871731, 63214871731, 7154153, 63217154153, 6984754
• Location on the vehicle: Left
• Category: Centre & Third Brake Light Assemblies

Harness Purpose and Function

The presented wiring harness is dedicated to the rear left side lamp of the body in the facelifted (LCI) BMW 3 Series E90 generation. It is responsible for the safe transmission of electrical signals to the lighting modules, particularly in the area of brake and position light functions, in accordance with the requirements of the Main and Center Brake Lights category. Using the correct, factory harness minimizes the risk of installation errors, flickering lights, or error messages about damaged lighting.

Construction and BMW Fitment

The harness has been specifically designed for the BMW E90 LCI platform, taking into account the body geometry and lamp mounting points. Appropriately selected connectors, wire gauges, and wire lengths allow for installation without modifications and maintain the original wiring route in the trunk and around the side panel. This avoids makeshift connections, quick soldering, or the use of universal adapters, which often lead to operational problems.

Benefits of Using an Original Harness

Using a dedicated rear left side lamp harness in a BMW offers a number of practical benefits:

• maintaining compatibility with the vehicle's factory electrical system,
• reducing the risk of contact overheating and voltage drops in the lamp circuit,
• easier diagnosis of potential lighting faults in the future,
• aesthetically routing wires in their original locations,
• no need to modify the lamp or the vehicle's main wiring.

This type of component is particularly useful when replacing lamps with facelift-compatible versions, repairing mechanical damage, or contact corrosion, when you need a reliable and durable connection without compromising quality.

Installation Characteristics and Condition

The harness is a used part, meaning it comes from a dismantled vehicle and has been verified for installation suitability. This type of component allows for an economical repair of the lighting system while maintaining the original BMW specification. Its placement on the left side of the vehicle facilitates part selection when comparing it with the existing installation in the car.

Selection, Numbers, and Technical Support

The harness has an OEM part number and associated interchangeable numbers, which facilitates precise identification in manufacturer catalogs or by VIN. Before purchasing, it is advisable to compare the markings on your harness with the data in the specifications to ensure the part will work correctly with the lamp and installation in your BMW E90 LCI. If in doubt, it is a good idea to consult an automotive electrician or a BMW lighting specialist to confirm configuration compatibility.

If you are planning a comprehensive repair or upgrade of the rear lighting area in your BMW and need other components from the same group, such as lamp modules, bulb holders, or additional harnesses, check the available parts in the Main and Center Brake Lights BMW category.

For a broader perspective on the cost-effectiveness of using aftermarket components, including electrical system parts, it is worth reading the expert guide on our blog: Why Buy Used Gearboxes and Engines – Facts Instead of Myths. Although it primarily concerns drivetrain components, the principles of selection by OEM numbers and approaches to used parts presented there are also helpful when choosing other car components.