BMW G20 G80 Rear Light Left N/S Lamp Tailgate Trunk Lid Inner Side LED 5A3BC57

BMW G20 G80 Rear Light Left N/S Lamp Tailgate Trunk Lid Inner Side LED is an original component from the Rear lights and brake lights group, designed for installation on the left rear side of the vehicle. It ensures a consistent look for the rear bodywork, proper light signaling, and compatibility with the factory BMW electrical system.

Specifications and technical data

• SKU: 5A3BC57
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 5A3BC57
• Substitutable numbers: 5A3BC57, 63215A3BC57
• Location on the vehicle: Rear, Left
• Category: Rear Light Assemblies

Purpose and function in the vehicle

The described lamp is mounted on the inner part of the trunk lid on the left side, working in conjunction with the outer rear light module. It is responsible for the correct display of light signals in the rear zone of the vehicle, which affects safety and the visibility of signals for other road users.

Thanks to LED technology, the component provides uniform, highly visible light while being optimized for compatibility with the factory lighting control in the BMW G20/G80 series.

Construction and LED technology

The lamp uses an integrated LED module, which is characterized by a fast response time and stable light color. The design is matched to the shape of the trunk lid, which guarantees proper fitment with the bodywork and maintains the original BMW styling line.

The arrangement of the LEDs has been designed to achieve a clear light distribution during braking and driving, while maintaining homologation requirements for rear lights and brake lights.

Installation and compatibility

The lamp is an OEM BMW brand component, which means a perfect fit for factory mounting points and the standard electrical harness. Installation typically involves:

• removing the internal trunk lid trim,
• disconnecting the lamp's electrical connector,
• unscrewing the mounts and replacing the module with a new one,
• reconnecting the wiring and reinstalling the upholstery.

This solution limits service time and reduces the risk of compatibility issues typical of low-quality aftermarket replacements.

Characteristics of the used component

The offered lamp comes from the secondary market, which allows for lower repair costs while maintaining the manufacturer's original specifications. A used OEM component is particularly beneficial for post-accident repairs or when replacing a single lighting module, especially when you want to maintain a consistent look for the entire set of rear lights.

Application in the Rear lights and brake lights system

As part of the Rear lights and brake lights system, the lamp contributes to the complete light signaling setup in the rear of the BMW G20/G80. A properly functioning inner trunk lid module is important not only for safety reasons but also for the correct operation of onboard systems that monitor the status of the lighting.

If you are planning a comprehensive repair or upgrade of the rear lighting zone in your BMW and need other components from the same group, such as outer modules, additional LED lamps, or complete light sets, check the available parts in the BMW Rear lights and brake lights category.

Why choose original used lighting

Choosing an original, used LED lamp for a BMW is a reasonable compromise between cost and quality. You receive a component designed specifically for the given model, maintaining factory light parameters and full integration with the vehicle's electronics. For drivers looking for additional information on the advantages of secondary market parts, it is worth reading the article Smart Skoda servicing – why second-hand parts are the best choice for your wallet, which discusses the broader economic context of using used OEM components.