UPDATED: 8/21/14 4:39 pm ET - adds detail
DETROIT (Reuters) -- Ford Motor Co. has told its U.S. dealers to stop test-driving and selling C-Max and Focus models produced during a week this month because of potential problems with the steering gear assembly, a notice sent to dealers on Wednesday shows.
A Ford spokeswoman said today none of the affected vehicles were sold to customers and that less than 50 were on U.S. dealer lots.
Some C-Max and Focus models built at the Michigan Assembly Plant outside of Detroit from Aug. 8 to Aug. 15 may not have enough ball bearings in the steering gear assembly, the notice to dealers obtained by Reuters said.
"This condition can result in deformation and degradation of the remaining ball bearings, which can lead to impaired steering, including the loss of steering control, increasing the risk of a crash," Ford said today.
Ford said 502 of the recalled vehicles are in transit to U.S. dealers, 108 are going to Canada, and six to U.S. federalized territories.
Dealers will replace the steering gear before selling the vehicles, Ford said.