The 2010 Nissan Altima has reasonably good crash-test scores, though it's less than perfect in a class of overachievers. The Altima sedan and Coupe models get a mix of four- and five-star ratings in federal crash tests, while they get Good ratings from the insurance-affiliated IIHS in frontal and side impacts and Acceptable ratings in both the seat-based rear-impact test and the new roof-strength test.
Front, side, and curtain airbags, along with electronic stability control and anti-lock brakes, are now all standard across the line, along with active head restraints that should help reduce the chance of whiplash.
Outward visibility is another good safety point in 2010 Nissan Altima sedans. Kelley Blue Book reports that the "Altima's generous glass area provides the driver with good sightlines to the outside world," though ConsumerGuide states that "thick rear roof pillars create large blind spots in the coupe," and Cars.com elaborates on the "reduced rear visibility" resulting from the "coupe's high back end."