U.S. safety regulators have opened a preliminary investigation into claims that Hyundai Motor's Sonata sedan may have steering problems, government officials said on Tuesday.
The investigation comes as Hyundai moved to increase production of the Sonata, its best-selling car in America, at its plant in Alabama.
There have been no injuries or crashes reported to the National Highway Traffic Safety Administration or Hyundai regarding the Sonata steering issue, NHTSA and company officials said.
Steering could be a problem on 16,300 Sonata sedans, NHTSA said, which also said Sonatas cited in its reports each had fewer than 600 miles driven on them.
NHTSA said it will investigate to verify consumer complaints that "the steering shaft allegedly decoupled from the hand wheel resulting in a complete loss of steering capability."
NHTSA opened the investigation for the Sonatas last Friday, a day after it began a preliminary investigation into an estimated 37,889 model-year 2009 Volkswagen Jetta TDIs that may have engine stalling problems. NHTSA said it received seven complaints on the engine problems.
On Aug. 23, after receiving 217 consumer complaints, NHTSA opened a probe regarding possible fuel spills during refueling on as many as 223,000 Chrysler Jeep Wranglers from model years 2007 and 2008.
No crashes or injuries have been reported to NHTSA regarding the Wrangler or the Jetta issues.
Hyundai spokesman Jim Trainor said two Sonata customers brought their sedans to Hyundai dealerships complaining of steering problems. Those cars were fixed and returned to the owners.
Hyundai said in a statement that it had not yet received the information request letter from NHTSA but would fully cooperate in any investigation.
Hyundai's US Market Gains
The Sonata is key to Hyundai's success in the U.S. market, and the South Korean automaker is advertising it as an alternative to the more expensive Japanese sedans of similar size.
Through July, the 108,000 Sonata sedans sold accounted for 46 percent of Hyundai's U.S. car segment sales this year. About 8,000 more were sold in Canada, Hyundai said.
On Tuesday, Hyundai affiliate Kia Motorssaid production of Hyundai Santa Fe small SUV would shift to Kia's plant in Georgia to allow the Alabama plant to make more Sonata sedans.
The capacity of the Alabama plant is about 300,000 vehicles annually, Hyundai said. Production of the Sonata and the Santa Fe brought the plant near capacity.
The Georgia plant will make two small SUVs, the Kia Sorento and the Santa Fe. A second shift will be added on Oct. 1 to allow for the Santa Fe production, Kia said.
Last month, a preliminary investigation was opened by NHTSA for the Kia Soul after a driver complained of a total loss of steering and limited braking in a car that was two-months old and had about 4,300 miles driven on it.
Hyundai's Trainor said the Soul and the Sonata issues are unrelated and it has not been determined if steering issues on either model are related to supplier parts.
The Soul is the rival to the Toyota Motor Scion brand targeted at younger drivers.
Hyundai's U.S. sales are up 23.4 percent from last year through July. In 2009, while the overall U.S. auto industry suffered a 21 percent drop in sales, Hyundai, its sister Kia, and Subaru were the only major auto brands to increase sales.
Kia's share of the U.S. market so far this year is 3.1 percent.
In 2008, Hyundai sales accounted for 3 percent of the U.S. market. Through July this year, its market share is 4.6 percent.
Kia sales through July were up 16 percent, outperforming the overall U.S. market's 14 percent gain.
Shares of Hyundai rose 0.7 percent as of 0100 GMT in Seoul, versus a 0.5 percent gain in the wider market.