Not sure this falls under this topic. I took my 6 month old corolla for a car wash recently and my wife noticed that water was seeping in through the back doors. I discovered that both back door moldings were coming out. I took it in for servicing and asked the technician about it. She indicated that it's a problem they know about even though it rare. This was confirmed by their courtesy shuttle driver. Replacement moldings are covered under warranty. It looks like some of the moldings were too small. Note to the 2003 Corolla owners and perhaps the '04 to take a careful look. I only discovered it recently cause I didn't wash my car during the winter.