My 07 titan has 8700 miles currently. I've noticed a clicking noise from under the truck. I've taken it to the dealer Elk Grove Nissan in California. I was told that the noise could not be heard. "I took the service writer for a test drive and he heard the clicking noise. Later that day when i picked my truck up i was told that the noise could not be heard and maybe it was fixed with the new brakes being installed. My brakes are fine for now but the noise is still there. Has anyone run into this problem? Is this a serious issue, should i be worried?