Steering Idler Arm problems of the 2007 Subaru Tribeca

I was driving my 07 Subaru Tribeca on a busy city street, at about 35 miles per hour, when multiple red lights came up and I could not turn the steering wheel. It was not locked, but it required significant effort to move it even a few inched to the left or right. It was extreemely stressful to be stuck in the middle of a busy avenue without any control over your vechicle. The repair shop came up with the following list of broken parts: belt tensioner, idler pulley, 2 bolts and an ac bracket. The total bill for the parts and labor was $780. I have been driving my car on highways and city streets only, never took it off the road. The car is only 5 years old with 58k miles on it. I don't understand how such an extensive damage to the car parts could happen other then that it is faulty. Is Subaru considering a recall for the above mentioned parts? thank you.