ORANGE COUNTY — Following an audit by the U.S. Environmental Protection Agency (EPA), Hyundai Motor America and Kia Motors America announced they are voluntarily adjusting the fuel economy ratings for approximately 900,000, or 35 percent, of their 2011-13 model-year vehicles. These are vehicles sold through Oct. 31, 2012.

Procedural errors at the automakers’ joint testing operations in Korea led to incorrect fuel economy ratings for select vehicle lines. As part of Hyundai/Kia’s corrective actions, the fuel economy ratings for vehicles currently in showrooms are being voluntarily relabeled. With these changes, the 2012 Hyundai/Kia fleet fuel economy level is reduced by an average of three percent — from 27 to 26 MPG.

“I sincerely apologize to all affected Hyundai and Kia customers, and I regret these errors occurred,” said Dr. W. C. Yang, chief technology officer of Hyundai/Kia research and development. “Following up on the EPA’s audit results, we have taken immediate action to make the necessary rating changes and process corrections.”

Both companies are putting in place a comprehensive reimbursement program for affected current and former vehicle owners to cover the additional fuel costs associated with the fuel economy rating change. Customers will receive a personalized debit card that will reimburse them for their difference in the EPA-combined fuel economy rating. In addition, as an acknowledgement of the inconvenience this may cause, the manufacturers will add an extra 15 percent to the reimbursement amount.

Current owners will be able to refresh their debit card for as long as they own the vehicle. Prior owners of affected vehicles who have already sold their cars will also be reimbursed using the same formula. For more information about reimbursement and a complete list of eligible vehicles, visit www.HyundaiMPGinfo.com and www.KiaMPGinfo.com.

The fuel economy rating discrepancies resulted from procedural errors during a process called “coastdown” testing at the companies’ joint testing operations in Korea. Coastdown testing simulates aerodynamic drag, tire rolling resistance and drivetrain frictional losses and provides the technical data used to program the test dynamometers that generate EPA fuel economy ratings.

“Given the importance of fuel efficiency to all of us, we’re extremely sorry about these errors,” said John Krafcik, president and CEO of Hyundai Motor America. “When we say to Hyundai owners, ‘We’ve got your back,’ that’s an assurance we don’t take lightly. We’re going to make this right for everyone, and we’ll be more driven than ever to ensure our vehicles deliver outstanding fuel economy.”

HYUNDAI FUEL ECONOMY ESTIMATES

KIA FUEL ECONOMY ESTIMATES