2023 Prius collision test - IIHS

Looking at the IIHS's site, it's interesting that the Rear passenger scored an M, while every other part of this test scored a G.
Interestingly enough, these ratings do not apply to the Prime. the Prime scored slightly higher overall, with a couple As here and there, but nothing worse.

 

The regular Prius went through a modified test while the Prime did not. The lower rating is because of the seat belt potentially hurting rear passenger’s abdomen in a frontal crash. There are no differences in seat belt design between the models.

 

BTW, the Prius and Prius Prime both qualified as a Top Safety Pick+ (the highest level).

Test results quick summary:

Prius
10 Tests/Evaluations
57 Good/Superior ratings
8 Acceptable/Advanced ratings
1 Marginal/Basic rating
0 Poor ratings
2023 Toyota Prius

Prius Prime
7 Tests/Evaluations
48 Good/Superior ratings
8 Acceptable/Advanced ratings
0 Marginal/Basic ratings
0 Poor ratings
2023 Toyota Prius Prime