Black Booktook a closer look at used-vehicle value impact stemming from Hyundai and Kia admitting last week they overstated the fuel economy of models sold during the last two years.

While there has been talk of broader ramifications to the brands, Black Book believes this acknowledgement will have little impact on future retention values.

Black Book editors arrived at that determination based on three points:

—Roughly 900,000 vehicles sold during the last two years were included in the overstated fuel economy admission.

Both brands said they would reimburse consumers and restate mileage estimates on specific models.

Drivers of these vehicles will be issued a debit card for reimbursement, expected to average approximately $88 based on a vehicle that averaged 15,000 miles this year.

—Black Book did not see retention and vehicle values on used models change noticeably on Toyota models impacted during the large recalls of 2008-2009. Beggs said these vehicles continued to follow segment trends.

—Black Book indicated larger market drivers will continue to impact vehicle values going forward.

The Hyundai Elantra is part of the compact cars vehicle segment, which has a current Black Book overall segment average of $7,176 today and down 6.9 percent since the end of August when it stood at $7,710).

The Hyundai Sonata is part of the upper mid-size car segment, which has a current Black Book overall segment average of $9,075 today and down 6.1 percent since the end of August when it settled at $9,662.