The new recall includes some Dodge Journey SUVs, Dodge Grand Caravans, and Chrysler Town and Country minivans that were made between Jan. 2007 and Aug. 2009. It is an expansion of a recall first issued in 2010 that included vehicles manufactured between Aug. 2009 and June 2010.
The recall comes after the National Highway Traffic Safety Administration began investigating the issue because it had received complaints of the problem.
Chrysler will notify owners about when they can take their vehicles to a dealer to be fixed. Until then, they should remove all items from their key rings, leaving only the ignition key.
A Chrysler spokesman said the automaker is unaware of any related injuries.