I used to have an import body/repair shop. Still have several cars I am restoring. One is a 2000 Avalon. I found water in it. I removed the entire interior except dashboard. I found the right rear drain tube in the sail panel (c pillar) was routed wrong and had a bad kink on it. It drained ok but over time had built up matter and eventually plugged up and water backed up and sent a steady stream of water into the cabin. This could happen in any car with age on it. Of course this caused the mechanism completely locked up. This might be a one only fail on the assembly line...but is something to consider if this happens to your car. Bragging here: I also have a rust free Celica By convert with under 200k. Hope to cherry it out and enjoy the road as I did in her years ago.