The Genuine BMW Additional Turn Indicator Lamp Left - 63137221859 is a replacement turn signal light for the left side of a BMW vehicle. This lamp is a genuine BMW product, ensuring high quality and compatibility with the vehicle. It is designed to provide additional visibility and safety while driving, especially when making turns. This turn indicator lamp is a direct fit for specific BMW models and is made with durable materials for long-lasting use. It is an essential component for proper signaling and should be replaced if damaged or not functioning properly.