When I was having a vibration in the Ody, I suspected that I had a bad active engine mount, but the Service guys were unsure since it is very rare. So, before I brought it in, I found where I could consistently reproduce the vibration on roads close to the dealership. Then, I rode with the technician and showed him exactly how to reproduce the vibration. Because of this, they were adequately able to reproduce the problem and work with Honda on possible problems. It ended up being the active engine mount.

So, I suggest that you do the same and MAKE them allow you to ride with them, or have them ride wtih you. Everytime it happens, point it out. Good luck.

2005 Honda Odyssey EX-L RES & NAV - Desert Rock Metallic

2006 Honda Civic Hybrid NAV - Magnetic Pearl

2007 Toyota FJ Cruiser - Black Cherry (First Toyota, Third non-Honda)