Genuine OEM Volkswagen Left Exterior Mirror Lane Change Assist Indicator, part number 5NA949145. This component is an integral part of the vehicle's blind spot monitoring system, providing visual alerts within the left exterior mirror to warn the driver of vehicles in adjacent lanes. It is a compact electrical part, weighing 0.028 kg and measuring approximately 60mm x 60mm x 35mm. Using a genuine OEM indicator ensures correct signal characteristics, precise integration with the vehicle's electrical system, and reliable operation of this critical safety feature.