Just wondered what the life of the Top & Bottom Hoses might be on a Jeep WJ its a run out Mk2 2005 reg?
In the past I have replaced these hoses and heater hoses when a vehicle is 10 years old but with the newer hose compounds they seem to be more durable and less prone to failure.
Last hose failure I actually had was on a 14 year old Mercedes W124 series 260E the bottom hose split as I was taking the vehicle out of my garage.