The document said a bolt in the rear axle mounting could fracture and cause the driveshaft to disconnect, increasing the risk of the vehicle accidentally rolling away while parked when the parking brake is not on.
Affected vehicles include various 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.
The NHTSA said dealers will replace any necessary parts or update the electronic parking brake software free of charge. Owners are expected to be notified through the mail beginning on June 6.
Ford did not immediately respond for a request for comment.