Southeast Toyota is recalling 1,555 MY 2007 Tundra vehicles due to a wheel nut issue. The recalled vehicles are MY 2007 Tundra equipped with 18" installed diamond finish 5-spoke alloy wheels (option code WN1 or WN4) or 20" installed painted alloy wheels with 6 dual spokes (option code WV1 or WV4). Affected vehicles were originally sold in Florida, Georgia, Alabama, North Carolina or South Carolina. When the vehicle was processed at the port, the upgraded alloy wheels were fastened with new wheel nuts. The wheel nuts can crack and break if they are not installed carefully or not carefully tightened. This wheel nut condition could occur at the time of wheel installation, tire rotation, or service.