The Genuine BMW Bulb Socket White (Kostal) - 61318370557 is a replacement part for BMW vehicles. It is a socket specifically designed to hold and connect a white bulb, and is manufactured by Kostal. This product is used for various lighting functions in a BMW, such as the headlights, taillights, and interior lights. It is a genuine BMW part, meaning it is made to the highest quality standards and is an exact fit for the vehicle it is intended for. This bulb socket is an essential component for proper lighting and should be replaced if it becomes damaged or worn out.