Hi,
I have the 2005 Luxury Odyssey (Australian version) and just had my engine replaced as it had bad oil rings after 240,000 Km.
The replacement motor was a low Km one at 85,000Km.
The replacement engine purrs away quite well but I get an anoying buzz vibration from the gas pedal with a low level hum sound at any speed or rpm when the gas pedal has any pressure put on it, even when stationary. I never had this on the old engine.
Could it be the engine , engine mount or some other issue.

Regards Mike