My X5 is in the shop right now because of a service engine soon light.

I received a call saying all three of my power steering hoses are starting to leak and they need to be replaced . . . for $1100

My extended warranty through National Warranty doesn't cover hoses.

Purchased in 11/04, Model year 2005
X5 3.0i
37k Miles

Is this normal for the life of these hoses? I am in Houston, I know it's hot but the vehicle is garaged at home and work.