"The involved vehicles may be equipped with incorrect front seatbelt height-adjuster assemblies mounted to the center pillar," Toyota said in a statement. "There is a possibility that, in the event of a severe crash, the incorrect height adjuster could separate.
"If this occurs, the seatbelt may not properly restrain the occupant, which could increase the risk of injury."
When asked by Edmunds if there are any injuries, accidents or fatalities linked to the recall, Toyota spokeswoman Amanda Rice wrote: "We are not providing specifics at this time."
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: This is a small, but important recall for 2016 Sienna owners.