IIHS side crash tests for minivans; Sienna rated 'marginal' while Odyssey rated 'good' IIHS side crash tests for minivans; Sienna rated 'marginal' while Odyssey rated 'good' August 16, 2018 dzadmin Comments 0 Comment The 2018 Toyota Sienna rated marginal in the IIHS’ latest passenger-side small-overlap front crash tests, while the 2018 Honda Odyssey received a good rating.