(AP) Chrysler Group LLC says it will recall about 490,000 cars and utility vehicles worldwide because of a problem with active head restraints intended to prevent neck injuries in rear-end collisions.

The carmaker said Wednesday that microcontrollers in the head restraint could be faulty and prevent the system from operating properly. Chrysler says it is unaware of accidents or injuries related to the problem.

Vehicles affected are the 2011-2013 Chrysler Sebring, 200 and Dodge Avenger midsize cars; 2011-2013 Jeep Liberty SUVs and 2011-2012 Dodge Nitro SUVs.

Chrysler is notifying customers and will replace the component or upgrade software at no cost.