Hyundai Motor America’s vp of marketing, Brian Miller, left the company last Tuesday after three months to return to Continental Automotive Systems, Hyundai confirmed last week. Miller, 48, oversaw U.S. marketing and advertising at the Fountain Valley, Calif.-based car maker. A rep said the automaker is seeking his replacement. The Richards Group in Dallas handles Hyundai’s creative. Aegis’ Carat does media. Hyundai spent $160 million on ads in 2002, according to TNS Media Intelligence/CMR.