ABS Systems on BMW models produced after 2007 are generally very reliable but if you have a solid 'Brake Failure' warning light their are a couple of posible causes. The most common being caused by poor connection to the pump motor. Generally caused by lack of use (of the ABS, not the motorcycle) the brushes inside the ABS pump motor become seized. We can rectify this fault by removing the ABS pump, Servicing modifying