The Genuine BMW Bulb Holder is a component used in the rear light of the trunk lid on the left side of the vehicle. It is designed to securely hold the light bulb in place and provide a connection for the electrical wiring. This specific bulb holder, part number 63217313059, is a genuine BMW product and is intended for use in specific BMW models. It is made from high-quality materials to ensure durability and reliable performance. This bulb holder is an essential part of the rear light system and is crucial for proper functioning of the vehicle's lighting.