Not approved by Honda for for towing four down for one thing, and the dealers do look for brackets, lights etc.
Our '05 Honda Odyssey is also not now approved for four down towing, but was when we bought it. I've towed it both ways behind the same MH. Last year we went to Fresno then over to Phoenix and towed it four down. Put a new battery in just before we left, it went dead three times. Many more chips in the paint. needed wheel alignment and new tires when we got back as the tire edges were worn too much.
So, back to towing it on the dolly.
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft
Charter Good Sam Lifetime Member, FMCA, SKP
RV'ing since 1957, NRA Benefactor Life, towing '05 Odyssey