DTC U0137, BMW Hex Code 0xCDA904, BMW Code 13478148: Lost Communication With Trailer Brake Control Module: Subcomponent

WARNING: This page does not describe the selected car, but rather 52 other vehicles, including the 2013 BMW X6 M, 2013 BMW X5 M, 2013 BMW M6, 2013 BMW M5, and 2013 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.