This is a genuine OEM Body Control Module (BCM) with part number 56049681AA from a used 2003 Dodge RAM 2500 with 104,000 miles. It may require reprogramming and comes with a 6-month manufacturer warranty. The BCM is responsible for controlling various electrical systems in the vehicle, such as lighting, power windows, and door locks. This product is interchangeable with part number 591-03576 and has stock number ENM4 and inventory ID 10240032.