Cooling System Hoses/lines/piping/fittings problems of the 2007 Lexus RX

The contact owns a 2007 Lexus Rx350. The contact stated while driving 30 mph, the vehicle began to smoke. The contact pulled over and became aware that oil was leaking from the vehicle. There were no warning lights illuminated. The vehicle was towed to a service center and the contact was informed that the engine cooler hose had ruptured. The vehicle was not repaired. The contact called the local dealer, but the vehicle was not diagnosed or repaired. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 99,000.