With revisions to the scoring from both the National Highway Traffic Safety Administration (NHTSA) and the Insurance Institute for Highway Safety (IIHS), the safety picture for the 2011 Chevrolet Impala has improved a bit.
The NHTSA is changing its ratings this year to reflect a new weighting of front, side and rollover impacts. It hasn't finished scoring all cars yet, and as a result, the Impala is not yet rated by the feds. We'll update this review when the final scores are in.
The IIHS, though, has upgraded the Impala from its previous "acceptable" rating for front-impact protection, to "good"--the same rating it's also given to the Impala's side-impact protection.
The Impala has standard dual front, side and curtain airbags; anti-lock brakes, traction and stability control; and tire-pressure monitors. However, it's completely lacking in options for features such as a rearview camera, blind-spot detectors and parking sensors. It does come with OnStar hardware for emergency assistance.