RPT-Losing the X-factor: Hyundai fumbles in U.S. as former hit car Elantra stalls

SEOUL, July 27 (Reuters) - At last February's Super Bowl,

Hyundai Motor hired 'X-Men' movie star Ryan Reynolds

for an ad plugging the new version of its Elantra sedan. Not in

the script: a slide in first-half sales of the South Korean

automaker's U.S. mainstay.

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