Honda 1998 Odyssey Owner's Manual page 79

Seats
Removing the Second Seats in the
Six-Passenger Model
LOCK RELEASE LEVER
Both seats can be removed to give
more cargo capacity.
To remove a seat, unlock the seat
from the floor by pulling both lock
release levers up at the same time
and pulling up on the rear of the seat.
Instruments and Controls
Unhook the front of the seat from
the floor by pulling it back slightly,
then pivoting it upward.
Always remove an unlocked seat
from the vehicle before driving. A
seat that is not locked in place could
fly around and cause injury in a
sudden stop or crash.
To reinstall a seat, hook the front of
the seat to the floor, then push the
back into the locks. Make sure both
the front and the back of the seat are
securely fastened down before
driving.
Folding the Second Seats in the
Seven-Passenger Model
The left and right halves of the
second seat can be folded up
separately to create more cargo
space.