The recall covers four-wheel-drive versions of the 2007 Tundra, Toyota’s Torrance, California-based US sales unit said on Monday in an e-mailed statement. There has been one occurrence of the problem, with no accidents or injuries, the company said.

Fails safety scores

The flaw follows an earlier announcement by Toyota that it would replace V-8 engines in 20 of the 2007 trucks because of defective camshafts. The revamped Tundra, which went on sale in February, also failed to win top safety scores for all model types in National Highway Traffic Safety Administration tests.

Toyota spokesman Bill Kwong said that “the rear propeller shaft in some of the vehicles may not have been sufficiently heat-treated by the supplier. If it separates, it would be like the vehicle went into neutral, with a lot of noise.”

The revised Tundra is Toyota’s effort to win more US sales of large pickups from General Motors Corp., Ford Motor Co. and Chrysler LLC. Toyota is second, behind GM, in total US and worldwide sales of cars and trucks. Notification of Tundra owners affected by the recall starts late this month, the Toyota City, Japan-based company said.