Resources:

Recalls on child seats:
http://www-odi.nhtsa.dot.gov/cars/problems/recalls/childseat.cfm

or

National Highway Traffic safety Administration.1-888-327-4236
The University of North Carolina Highway Safety Research Center.   ( 1-800-672-4527 )
American Association of Pediatrics.
www.aap.org/family/carseatguide.htm