DETROIT -

Nissan Motor Co is recalling 13,919 of its top-selling Altima sedans in the United States because bolts that may not have been tightened properly during production could fall off, increasing the risk of a crash, according to U.S. safety regulators.

The Altima sedans are from the from the 2012 and 2013 model years and were made at the Nissan plant in Canton, Mississippi, from May 10 to July 26, Nissan North America told the National Highway Traffic Safety Administration.

"Some of the subject vehicles may have been manufactured with four transverse link bolts and two power steering rack bolts that were not torqued to the proper specification," Nissan told regulators in a letter NHTSA showed on its website.

As a result, the bolts may shake loose during driving, the letter states, and drivers may notice rattling noise.

There was no mention of any injuries or crashes as a result of this issue on the NHTSA website.

Through September, in the U.S. market, 27 percent of the vehicles Nissan sold were Altima sedans.

Altima sales through September were up 17 percent from last year, at 234,040.

Altima owners will be asked to bring their cars into Nissan dealerships, where the bolts will be torqued to the proper specification, NHTSA said. The cars are under warranty protection.

Owners will begin to be notified on Oct. 29, Nissan told NHTSA.