Art wrote: || Believe me the rattles are a lost cause. Had a new one in my 2001 || Avalon with 20k miles on it. It was there for a half hour ride to || the store. But none on the way back. Go figure. ||
Upon opening my hood, I found a bunch of dried leaves on the outside of the cabin air vent intakes. Removed them. No more mysterious rustling sounds which increased in volume the faster I drove.