The recall covers 2008 Jeep Commander and Grand Cherokee SUVs, Chrysler 300 and Dodge Charger sedans, and Dodge Magnum wagons. All were built before May 12, 2008.
Chrysler says the ignitions may not fully return to the "on" position after being started. The switches could move to "accessory" or "off." That could shut off the engine and knock out power-assisted steering and other features.
Chrysler knows of one crash and no injuries from the problem. It's telling people to use the key alone in the ignition and confirm that switches have returned to "on" after starting their cars.
Chrysler is investigating the cause. Customers will be notified when repairs are ready.