Air condition drain may get clogged
I had this happen to me at the cost of $600.00 for new carpet. If you park near
trees or any thing that may have little buds they can clog the drain. What I do is when I replace the cabin air filter I also blow out the drain. I remove the cabin filter and before I put the new one in I then blow out the drain. The objects will get blown out where the filter is. I do not think they even do this at the dealer so be on the look out. I have a 2011 Nissan Murano.