Hyundai plans to mail owner notification letters Jan. 17, 2025. Owners can also contact Hyundai customer service at 1-855-371-9460 or Genesis customer service at 1-844-340-9741. Reference numbers are 272 for Hyundai and 025G for Genesis. Some of the recalled vehicles are involved in a previous recall, but will need to have the new recall work completed as well, according to the NHTSA.