I have a NEW NIB Curt 56118 Trailer Wiring Harness for a 2011-2015 Honda Odyssey for sale. Per Etrailer it is the same as 56378 harness which is actually for a 2011-2017 Odyssey, but we purchased this in 2014 so I think that is why it is stamped as '11-'15 on ours. Here is etrailer link: