An electric brake system is a great addition to any tow vehicle. The Mazda Electric Brake Controller allows your trailer electric brakes to seamlessly integrate with your CX-90's braking system. Towing safety is improved by controlling your trailers electric brakes. When choosing to tow two ton or more, a breakaway harness is legally required to be fitted. This breakaway harness (integrated) supplies power to the trailer breakaway system as an enhanced safety feature.