Volkswagen Group of America has named a new chief executive amid slumping sales in 2013.

Michael Horn, 51, who has been head of VW's global after sales, is replacing Jonathan Browning at the company's Herndon, Va., headquarters.

Browning is leaving for personal reasons and return to the United Kingdom, according to a VW statement.

Horn has headed the brand's global after sales since 2009.

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