HIghlander leaking water when it rains, while sitting still or driving. Original owner complained to dealer and they never identified a root cause. I bought the car (2nd owner). Now the floors flood with 1" of water after a hard rain. Dealer says it will cost $750 just to diagnose (they think it's coming from the luggage racks on the exterior). Will need to replace jute and all carpet too for $2000! Car isn't that old. There are endless complaints online about Toyotas leaking water!