I have the 09 Tucson 25th Aniversary model. For over a year I have noticed the driver floor damp under the mats. After a heavy rain there was a lot of water on the floor. Took in and they discovered the drainage lines from the sunroof were leaking on both sides and running into the floor (not sure how). They said that they were not connected to well when built and they sillicone them. Just got it back so I'm not sure if this fixed the problem. They said they would lift the carpet and check for mold or rust and clean, but I know they did not do that. Has anyone else ever heard of this?

 

Common to a lot of cars with sunroofs. Warranty fix.