Hyundai Motor Co., South Korea's largest automaker, is recalling 65,000 Elantra sedans in the U.S. to replace a fuel pump that may lose pressure and degrade the engine's performance. The voluntary recall affects 2008 model-year Elantras with a 2.0-liter Beta engine, according to a letter from the Seoul- based automaker posted on the Web site of the National Highway Traffic Safety Administration. Some fuel pumps installed from Nov. 5 to June 28 may lose pumping pressure as gasoline with ethanol produces a buildup of film on the units' electrical contacts, leading to poor starting or engine hesitation, Hyundai said. The automaker said it wasn't aware of any injuries related to the defect.