The Genuine BMW Optical Conductor Door Handle Left - 63319138421 is a high-quality replacement part for BMW vehicles. It is designed specifically for the left side door handle and is made from durable materials to ensure long-lasting performance. This door handle features an optical conductor, which allows for the control of the door lock and handle functions through the use of light signals. It is an authentic BMW product and is compatible with various models including the 3 series, 5 series, and X3. This door handle is a direct fit and easy to install, making it a convenient choice for BMW owners in need of a replacement.