US to investigate Corolla problems, says source

WASHINGTON - The Transportation Department plans to open a formal investigation into the 2009-2010 Toyota Corolla because of potential problems with the car's power steering, a department official said.

The preliminary investigation is expected to be opened on Thursday (US time) and will involve an estimated 500,000 vehicles.

The official spoke on condition of anonymity because the department had not yet notified Toyota of the probe.

Toyota said at a news conference in Japan on Wednesday that it was looking into complaints of power steering problems with the Corolla and was considering a recall as an option. Toyota said fewer than 100 complaints have been received.

In the United States, the National Highway Traffic Safety Administration has received about 150 complaints from drivers about the issue. The complaints are small compared to the number of vehicles involved - the department said the investigation involves about 363,000 vehicles from the 2009 model year and about 136,000 vehicles from the 2010 model year.

In the Corolla complaints, drivers have said they felt they were losing control over the steering, particularly at highway speeds.

Executives in Japan said it was unclear why drivers were experiencing the problems, but it could be related to the braking system or tires.

They said the company's internal investigation was preliminary, and no decision had been made, but Toyota was prepared to supply fixes, including a recall as one possibility, if defects were found.

Toyota has recalled 8.5 million vehicles because of problems with gas pedals, floor mats and brakes.

The 2009 and 2010 Corollas already are the subject of two safety-related recalls, one for potentially sticky accelerator pedals, the other over the possibility that gas pedals could get caught on floor mats.

- AP