Toyota is recalling 670,000 Prius hybrids in the U.S. -- out of 2.77 million Toyotas worldwide -- for weak steering linkages that could break and hybrid systems that could fail, the company said early Wednesday morning.

Second-generation Prius models from 2004-2009 may have intermediate extension shafts that are of "insufficient strength" and could snap, said Alain Taverriti, a Toyota spokesman in Europe.  The shafts connect the steering wheel near its gear box inside the cabin. Toyota says the shaft could break if drivers turn the steering wheel to its full left or right positions at low speeds, such as when parking, or if a tire were to hit a curb at low speeds.

In 2006, Toyota recalled 170,856 Prius models in the U.S. from the 2004-2006 model year for other steering components that could break -- caused by the same low-speed turning maneuvers -- and cause drivers to lose steering control. While similar, the two steering parts are located at different places along the shaft, Taverriti told MSN Autos. No injuries or accidents have been reported as a result of either of the recalls, Toyota said.

Of the 670,000 models recalled, 350,000 will also be recalled to repair the electric water pump that helps cool the hybrid battery pack. Toyota said that the pump could stop working and cause the car's hybrid system to shut down while driving -- which could mean a complete loss of battery assist. Current and first-generation models are not affected. Other Toyota models, including the Corolla, were recalled in other markets but not in the U.S.

Dealers will replace the steering extension shafts and water pumps on affected cars starting in December. Owners can contact Toyota at 1-800-331-4331 or at www.toyota.com/recal​l.

In October, Toyota issued the industry's largest recall in 16 years for faulty power-window switches that could cause electrical fires. A total of 7.43 million cars were affected, including 2.5 million in the U.S. Last week, Toyota recalled the Scion iQ for airbag sensor problems.

[Source: Toyota]