I have the predecessor unit to this installed in my 2004 Prius for
iPod integration with the touch screen/display and dash/steering wheel
controls, so I don't have experience with it in a Sienna (but the site
claims it'll work for all Toyota/Lexus). Keep an eye out on some
dedicated Toyota forums, as occasionally Vais Tech will offer a group
buy pricing if you're willing to wait.
I tend to only hang out in Prius forums... However, the last group
buy I saw was actually offered on the vaistech forums:
Hey, the most recent group buy is still open! But the configurator on
the purchase site only lists the 2004 Sienna with factory navigation,
I've also heard some reviews for the DICE Electronics (formerly
Denison) iPod integration kits as well. Their online configurator has
no problems suggesting an iPod kit for a 2004 Sienna. (and they're a
little less expensive than the Vais Tech products)
Good luck with your decision!
I don't recall hearing of a "USA Spec" brand, good/bad or anything.
But my experience is with Prius lists (not Sienna), and frankly, since
I have the Vais AIC-100i (predecessor to the SoundLinQ SLI) on my 2004
Prius (now sold to a family member), I don't really pay much attention
anymore to the iPod integration threads (so it is possible that I've
missed a discussion of a "USA Spec" product).
Sorry I can't be of more help!
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