Ford Motor a big recall of a 470,000 Ford Mustangs from the 2005 to 2008 model years to update passenger side front-air bag software.

Ford spokesman Wesley Sherwood said internal testing showed the air bag could injure a small, unbelted passenger. The recall was posted Wednesday on the Web site of the National Highway Traffic Safety Administration

The Dearborn automaker will notify customers by mail in early March. Owners can take their vehicle to a dealer to have the air bag recalibrated to deploy at a lower force.