The Genuine BMW Adapter Bulb Socket Turn Indicator is a replacement part for BMW vehicles. It is designed to hold the turn signal bulb in place and connect it to the vehicle's electrical system. This adapter bulb socket is made from high-quality materials and is an authentic BMW product. It is specifically designed to fit the BMW 63120025499 turn signal bulb. This product is essential for proper functioning of the turn signal and ensures a secure and reliable connection.