2012 Prius V w/24k miles. Have experienced a noise while driving. (best I can describe it is like when moving a straw up and down through the lid on a styrofoam cup). It is intermittent. Have discussed this with the dealer service department at least three times. One tech drove with me said he found a bad front strut which was replaced. It took some time but noise returned. I can hear it when others can’t and can feel it through the floor board. It may be muted but also so loud my wife says it sounds like something is going to fall off. Does it at slow speeds across parking lots on smooth surfaces or on road on smooth and rough surfaces in any kind of weather conditions. Will be taking it in for 25k service soon and would like help on what to look for.
I would try lubing the rubber bushings. http://www.amazon.com/Wurth-HHS-2000-Penetrating-Temperature-Lubricant/sim/B0002XRDLE/2