nh9095

Car is a 2005 V6 Cayenne w/ just over 50,000 miles. The other day after about 15 minutes of driving I could hear a noise coming from the front end. I turned radio down to hear it better and it was a whistling noise. It went away after a minute and didn't hear it again that day. Yesterday when driving I heard it again and thought maybe I had something in my front wheel or tire but then it went away again and didn't hear it for the rest of the day. Today I was driving around local neighborhoods and I heard it while driving and it would start and stop every 30 seconds to a minute at low speeds. Any ideas would be appreciated. Thanks guys