The contact owns a 2017 Mini Cooper Clubman. The contact stated that while driving at an undisclosed speed, a message was displayed that the rear brake light was not functioning. No warning lights were illuminated. The vehicle was taken to an independent mechanic and the contact was informed that the body domain controller needed to be replaced. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 17V222000 (Exterior Lighting); but the VIN was not included. The manufacturer was notified of the failure but provided no assistance. The failure mileage was 48,000.