BMW F31 Rear Light Lamp Lighting In The Side Panel Left N/S 7429727

Visual condition of the part

The product shows signs of use visible in the photos. BMW F31 Rear Light Lamp Lighting In The Side Panel Left N/S is an original component from the Main and center brake lights group, designed for installation in the left rear fender of the 3 Series F31 estate. This used lamp ensures a factory-fit to the bodywork, maintaining proper geometry, aesthetics, and lighting signal functionality. It is a practical solution for drivers who want to restore full lighting efficiency without compromising on compatibility.

Specifications and technical data

• SKU: 7429727-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7429727
• Substitutable numbers: 63217429727, 7429727, 63217414021, 7414021, 63217313049, 7313049, 7372787
• Location on the vehicle: Rear, Left
• Part type: Centre Brake Light Assembly
• Category: Centre & Third Brake Light Assemblies

Purpose and fitment for BMW F31

The presented lamp has been designed specifically for installation in the rear left part of the body, in the fender area. This ensures the correct shaping of the lens and housing relative to the body lines of the BMW 3 Series F31, which translates into proper alignment with the tailgate and adjacent body panels. As a result, a consistent body line is maintained after replacement, and the gaps between elements remain uniform.

Function in the Main and center brake lights system

The lamp plays a key role in the rear brake light system, responsible for clearly signaling braking and ensuring vehicle visibility from the rear. A properly functioning brake light increases safety in urban traffic and on the road, especially during sudden deceleration. This component works in conjunction with the other rear lamps, creating a cohesive lighting system in accordance with the manufacturer's factory specifications.

Advantages of using an original BMW lamp

Using an original BMW component from the Main and center brake lights category allows for the preservation of factory optical and electrical parameters. Properly selected lens and reflector materials ensure correct light diffusion, and the construction intended by the manufacturer reduces the risk of fogging or leaks after correct installation. This is particularly important for a component located in the corner of the body, exposed to water, salt, and variable temperatures.

Characteristics of the used component

The offered lamp is a used item, which in practice means it has been removed from a vehicle and has seen service. This type of solution is often chosen by owners of premium cars who are looking for a compromise between repair costs and maintaining original build quality. A used OEM component usually blends better with the existing optical aging of the remaining lamps than a new replacement, which helps maintain a consistent look for the rear of the vehicle.

Support in selection and the trend in the used parts market

When selecting a rear lamp for a BMW, it is worth paying attention to compatibility with the body version and the placement on the vehicle to avoid installation problems and lighting operation errors. If you want to better understand why original used components for premium brands are becoming an increasingly popular choice, check out the article Crisis in the new parts market? Why used originals for premium cars are the hottest trend in 2026, which discusses the current market situation and the benefits of such a solution. If you are planning a comprehensive repair or upgrade of the rear lighting zone in your BMW and need other elements from the same group, such as light modules, additional lamps, or complete rear lamp assemblies, check the available parts in the BMW Main and center brake lights category.