NHTSA Complaint #11712937 — 2017 BMW X5

While driving, the electronic parking brake (EPB) system malfunctioned. The vehicle was stopped in DRIVE with Auto Hold active. When the driver door was opened briefly, the vehicle attempted to transition from Auto Hold to applying the electronic parking brake as a safety function. At that moment, the EPB malfunction warning appeared and the parking brake system faulted. There were no prior mechanical brake issues (no dragging brakes, no unusual noises, no brake wear symptoms). The issue appears to be an electronic/control-related failure of the EPB actuator/control unit rather than typical brake wear. A repair facility retrieved multiple diagnostic fault codes related to the electronic parking brake actuator/control unit and recommended replacement of the EPB actuator assembly followed by initialization/calibration and clearing of faults. This creates a potential safety risk because the electronic parking brake may apply unexpectedly or may not apply/release as intended during safety logic events (such as opening the driver door while stopped), potentially immobilizing the vehicle or creating a hazard in traffic or parking situations.