2002 Taurus, brittle hose under hood broke. What is it?

Not sure what it is But if you can feel vacuum I rec to replacing that and all hoses vac leaks will affect mpg

Repair is possible with a small diameter piece of vacuum hose. The areas that are brittle may continue to break as you handle them. It breaks because of temperatures under the hood, exposure to the atmosphere, and time. Thirteen years ? Yeah, I would say maintainingthe car properly would include vacuum lines be maintained. What does it connect to? You can map it out using the underhood sticker, the CAFE regulation sticker for tune-up. It includes a color vacuum hose routing diagram... on every car since the early seventies or there about. Lines with repeat issues cab be protected with sleeves. or if you want to create something? reynolds wrap ? it is like the reflective insulation sleeve material, but costs cents instead of tens of dollars.