BMW E90 Bulb Socket Rear Left N/S Bulb Holder Light Cable Wiring 6940320

BMW E90 Bulb Socket Rear Left N/S Bulb Holder Light Cable Wiring is an original rear lighting system component designed for installation on the rear left side of the vehicle. It ensures secure bulb seating, proper electrical connection, and compatibility with the factory BMW wiring, which translates into safe and predictable operation of the tail light. This is a practical solution for users who want to restore full lighting functionality without compromising on fitment.

Specifications and technical data

• SKU: 6937473-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6937473
• Substitutable numbers: 63216937473, 6937473, 6940320, 42131581
• Location on the vehicle: Rear, Left
• Category: Other Interior Parts & Accessories

Function and application of the bulb holder

The presented bulb holder is responsible for the mechanical mounting and electrical connection of bulbs in the left rear light of the BMW E90 series. This component serves as a base for the sockets and contacts, ensuring that the bulbs remain securely seated and their connection to the vehicle's electrical system is reliable and resistant to body vibrations.

Positioned in the rear area on the left side, the holder works with the tail light assembly, including parking lights, brake lights, turn signals, or reversing lights – depending on the specific lamp configuration of the given vehicle. Replacing this component is recommended in case of mechanical damage, overheating of bulb sockets, or issues with electrical contacts.

Compatibility and fitment for BMW

The holder has been designed as a part dedicated to BMW, which means it maintains factory geometry, mounting spacing, and contact layout. As a result, installation is straightforward – the component fits the lamp structure and electrical harness without the need for modifications or adaptations.

The presence of the OEM part number and associated interchangeable numbers (visible in the technical specifications) facilitates verification of compatibility with the specific body version and model year of the BMW E90. This is particularly important when selecting used components, where precise fitment has a direct impact on the reliability of the lighting system.

Characteristics of the used component

The offered bulb holder comes from the secondary market, which allows for cost-effective repair of the lighting system while maintaining original BMW specifications. The used component retains its factory design and is a good alternative to aftermarket replacements with uncertain fitment. In practice, this means the ability to restore the proper operation of the tail light while reducing service costs.

Before installation, it is recommended to perform a standard inspection of the contacts and mounting surfaces, as well as to use appropriate bulbs in accordance with the vehicle manufacturer's recommendations. A correctly selected and installed holder minimizes the risk of flickering lights, dashboard error messages, and socket overheating.

Benefits of using an original BMW holder

• Factory fitment for the left rear light of the BMW E90, with no need for installation modifications.
• Stable bulb mounting, reducing the risk of looseness and power interruptions.
• Consistency with the factory electrical harness, which facilitates diagnostics and service.
• Economical repair solution thanks to the use of a used part with OEM specifications.

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 additional bulb holders, lamp housings, or mounting elements, check out the available parts in the Other BMW category.

Technical support and knowledge about sports systems

When working with lighting installations and other components, it is worth knowing the structural differences between standard and sports versions. For a comparison of solutions used in high-performance cars, you can use material describing the construction of engines, brakes, and chassis in RS models – details can be found in the article Audi RS vs other models – what is hidden under the hood and chassis?.