The Genuine BMW Finisher B-Pillar Outer Left (Gloss Black) - 51357263379 is a replacement part for the exterior of a BMW vehicle. It is specifically designed for the left side B-pillar (the vertical support between the front and rear doors). The finisher is made of high-quality materials and has a glossy black finish to match the rest of the vehicle's exterior. It is an authentic BMW product and is designed to fit and function perfectly on compatible models. This finisher can be used as a direct replacement for a damaged or worn out finisher, providing a seamless and professional appearance.