Read the latest on Hyundai's plug-ins Email consumeraffairs@hmausa.com Mailing Address P.O. Box 20850 Fountain Valley, CA 92728-0850 Telephone Number 1-800-633-5151 Hyundai's Subsidiary Companies Telephone Number 1-949-470-7000 Mailing Address P.O. Box 52410 Irvine, CA 92619-2410