DETROIT » General Motors Co. is recalling more than 40,000 cars sold in warm-weather states because a plastic part might crack and cause a fuel leak.

The company is recalling Chevrolet Cobalt and Pontiac G5 sedans from the 2007 through 2009 model years and Chevrolet Equinox and Pontiac Torrent SUVs and Saturn Ion sedans from the 2007 model year.

The recall affects vehicles sold or currently registered in Arizona, California, Florida, Nevada or Texas. Owners in Arkansas and Oklahoma also are included in the recall of the 2009 Cobalt and G5.

The vehicles have plastic parts connected to the fuel pump which could crack. If the crack gets large enough, fuel could leak out of the vehicle and cause a fire.

GM says there have been no reports of fires or injuries related to the defect. The company began investigating the issue in 2011 after a dealer reported fuel leaking from some vehicles.

GM says its warranty data indicates that the problem is far more common in warm-weather states. It will repair the vehicles for free in those states. Owners will be notified of the recall by mail.

But the company also plans to send letters to owners in other states offering a free repair within a limited time period if the parts are cracked. That offer is valid for 10 years or 120,000 miles from the date the vehicle was sold, spokesman Alan Adler said.

The National Highway Traffic Safety Administration announced the recall on its Web site today.