The Genuine BMW Bulb Holder Rear Light Side Panel Left - 63217262573 is a replacement part for the rear light on the left side of a BMW vehicle. It is used to hold the bulb securely in place and ensure proper functioning of the rear light. This product is a genuine BMW part, made specifically for BMW vehicles, and is designed to meet the high quality standards of the brand. It is constructed with durable materials to ensure long-lasting performance and is an essential component for maintaining the safety and functionality of the vehicle's lighting system.