This is my third Odyssey. prior models were great, just the 2014 has this problem of rear seat rattle. Guess Honda quality has gone down. Went to dealership they verified problem and found same with brand new model on floor they said they could not do anything at this time. the car was to new.

Update from Jun 4, 2014: Dealer Rep, checked this is report thry gave

Honda Rep/xxxxx Test drove car and noted from 3rd row seat/ rattle over very rough roads/ Normal when conpaired to similar vehicle/ vehicle is operating as designed.

So what I came to a conclusion is Honda designs vechicles with rattles and they don't care