Power Steering Hose, Piping, And Connections problems of the 2002 Hyundai Sonata

I was driving on a highway with my 2002 Hyundai Sonata with a 2. 7 ltr. 6 cyl. Engine,when I got off at my exit I took a right turn with no problem but when I went to take an immediate left turn I totally lost my power steering making it very hard to steer. When I looked under the hood I found that the metal line had rusted through and burst. This is only a 4 year old car. It was towed to garvey Hyundai where they replaced the line. So I checked my wife's car which is identical except the color and found that her line is in the same rusted condition but had not yet burst so she called lia Hyundai by our house ,told them what happened to mine and that hers is in the same corroded condition and they said they will not replace it under warranty until it also burst even if it is corroded. I feel this is a potentially dangerous situation as she may not be able to steer the car if it does burst and when mine burst it sprayed all over under the car, getting on the converter, muffler and tailpipe creating a potential fire hazard. I do not have the old part but the line runs along the frame and where it rotted they have a piece of rubber hose to protect the line but it also caused it to prematurely rot the metal line under the rubber hose so the line burst. Due to the fact the car is only 4 years old and both are identical cars rotting the same way, I feel this is a potentially dangerous defect that is going to happen to others because of the design and if someone can't steer the car after it blows they could have an accident or a fire could start due to it getting on the exhaust. I would like to get a response soon as my wife is concerned about it happening to her. Thank you.

Power steering line rusted out and blew. Under a protective rubber sleeve. It blew out while driving.