"Connectors for the automatic transmission key interlock on some vehicles may not have been connected during pre-delivery service prior to sale," Toyota said in a statement.
If that happened, "it is possible to remove the key in gear positions other than 'Park.' This could increase the risk of vehicle rollaway and a crash," it said.
When asked by Edmunds if there are any injuries, crashes or fatalities linked to the recall, Toyota spokeswoman Cindy Knight wrote: "We are not providing specifics at this time."
Toyota dealers will inspect the ignition key interlock function and, if necessary, connect the proper parts. The recall is expected to begin in early March. Owners can contact Toyota customer service at 1-800-331-4331.
No information about the recall has been posted on the website of the National Highway Traffic Safety Administration, which oversees vehicle safety in the U.S.
Edmunds says: Owners of these vehicles should wait for their official recall notice and then schedule a service appointment with their dealer. But if you have an immediate concern, it's best to contact your dealer now.