The company said a rear seatbelt may not hold a child seat securely.
The recalled Foresters are model years 2009 to 2012, according to the National Highway Traffic Safety Administration (NHTSA).
NHTSA said the rear center seatbelt in the affected cars do not meet federal safety standards. The administration said there is a risk of crash injury due to improper safety seat installation.
Dealers will notify owners and begin replacing the belts free of charge starting April 13.
The problem was discovered in testing of the SUVs. It was unclear if it has caused any injuries.
The Associated Press contributed to this report.