The document said that a bolt in the rear axle assembly could break and cause the driveshaft to disconnect, increasing the risk of the vehicle accidentally rolling while parked when the parking brake is not set.
Affected vehicles include several 2020-2022 Explorer models, including the Explorer Hybrid and Explorer Plug-In Hybrid. Some 2020-2021 Explorer Police Interceptor SUV and hybrid models are also affected by the recall.
NHTSA said dealers will replace any necessary parts or update the electronic parking brake software free of charge. Owners are expected to be notified by mail starting June 6th.
Ford did not immediately respond to a request for comment.