This is very odd, but I think I am hearing power steering noise/wine on a cold engine in the morning. I realized the 11 Siennas have electric P/S. Please correct me if I'm wrong. However with the weather cooling off here in the MidAtlantic, I'm beginning to hear this more consistently. It's not loud, just enough for me to get my attention. It's usually in the early morning when I'm backing out of the driveway. Throughout the day, even after parking several hours, I don't hear anything. The wine seems to change with rpm which reminded me of my previous 05 Oddy which had a recall on all their faulty P/S pumps.