I know many of you have 3 Radians in the 3rd row of your Sienna. I just wanted to confirm that they will work in the 7 seater sienna. Two of the seats are Latch compatible, while the 3rd spot doesn't have the latch connections. I can't find any stores that sell the Radians locally, so I'm going to have to buy online and don't want a nasty surprise when they get here.

Christina

Daughter born 1/4/09
BBB born 9/9/10 @ 27w 5d
Daughter born 8/14/12
http://schroeters.blogspot.com/

We have the 7-seater Sienna and it fits 3 Radians across the back. As you indicated, one is attached without latch. It is VERY tight and snug for sure, but they are in there!