The SX trim scored higher because it comes with LED projector headlights while all other trims only include basic halogen bulbs. Headlights have been a major issue for a lot of US-spec vehicles in the past few years, causing many to miss out on the highest IIHS ratings. Automakers would have an easier time building better headlights if they were allowed to use fully adaptive high beams, which can automatically redirect light when it senses an approaching car.

These systems currently exist in Europe, but the US Federal Motor Vehicle Safety Standard Number 108 from 1967 prevents automakers from offering them here. That's right, we are still following a law from the '60s regarding vehicle safety more than five decades later. Automakers have lobbied to change the rule but have thus far been unsuccessful.