The Sentra gets top "good" ratings in frontal offset, side, and rear tests from the Insurance Institute for Highway Safety (IIHS) and nearly all top ratings from the federal government, with only one four-star result for rear passenger side-impact protection. Side and side-curtain airbags are standard. But Nissan is a step behind some other automakers in safety features. For 2010, Nissan now offers electronic stability control as an option across the more affordable models, but it's standard on 2.0 SL, SE-R, and Spec V models. However, anti-lock brakes remain optional, not standard, on the base 2.0 models.