The Insurance Institute for Highway Safety hopes a new seat and head restraint evaluation will push automakers to modify head restraints and seat designs to better protect occupants from rear-end crashes. In the first initial rounds of the test, only four of out the first 18 small SUVs tested earned a good rating. The Audi Q3, Hyundai Ioniq 5, Subaru Forester and Toyota RAV4 were good performers in the new whiplash prevention test. The original IIHS head restraint test involved a single pulse equivalent to being struck at 20 mph by a vehicle of the same weight. The evaluation was discontinued in 2022 because automakers had improved their designs so that virtually all the vehicles tested now earned good ratings.