Re: Possible to add 8th seat to 7 passenger Sienna?
It cannot be done. The floor is different between a 7 and 8 seater and cannot be modified without replacing the floor plan. That is a shame because on my 1st gen Odyssey I can swap out mounting plates and go from the bench seat to bucket seats fairly easily.
2004 Sienna LE 7 in White 177K miles w/ alloys, power sliding door, homelink, trip computer, DVD, DRL mod.
1995 Odyssey LX in White 260K miles.