Genuine BMW Differential Output Flange Seal - 33107505602 - This genuine BMW differential output flange seal is a direct replacement for the original seal that is found on many BMW models. It is designed to keep the differential oil from leaking out and to keep dirt and debris from entering the differential housing. The seal is made from durable rubber material and is designed to last for many miles. It is an OEM part that is specifically designed for BMW vehicles and is a great choice for anyone looking to keep their differential in top condition.