The Sienna was the replacement for the mid engine Previa. Many people believe it was Toyota bowing to America in a sense of what people wanted, to compete with Chevy and Ford. It was given a V6, but FF layout.

The top trim levels had captain’s chairs for the middle row.

Upgraded from the Previa, Dual sliding doors.

The mid cycle update was that the tail lights would be red and clear and the front/rear bumpers were also different.

Roof rack and running boards were options.

“Symphony special edition package for LE models that includes keyless entry, a roof rack, cloth seats with a new gray or oak-colored fabric, captains chairs for the first two rows (with six-way power for the driver’s seat), 215/65-aspect tires on 6.5-inch alloy wheels, privacy glass, a leather-wrapped steering wheel, color-keyed heated power side mirrors, an overhead console with HomeLink, painted bumpers and cladding and Symphony badging, floor and cargo mats.” 

I haven’t really seen many of these built up.