VANDALIA, Ohio (AP) — Evenflo Co. issued a voluntary safety recall Friday of 1 million Discovery infant car seats after tests showed that the seat could potentially become separated from its base in high-impact side collisions.

The recall affects Discovery Infant Car Seat Models 390, 391, 534 and 552, made between April 2005 and Jan. 29, 2008. Evenflo is providing owners of the seat models a free supplemental dual-hook fastener to ensure that the seat remains attached.

Testing by Evenflo and the National Highway Traffic Safety Administration showed a potential safety risk to children, said NHTSA Administrator Nicole Nason. Rob Matteucci, Evenflo's chief executive officer, said there have been no reports of any serious injuries or deaths.

The privately held company, based in suburban Dayton, said it is not necessary for owners of the car seats to stop using them or return them. To order the fastener, seat owners should call Evenflo at 1-800-356-2229 between 8 a.m. and 5 p.m. EST or visit