The contact owns a 2007 Hyundai Santa Fe. The contact stated that while the vehicle was being serviced, the mechanic informed the contact that the underbody of the vehicle was corroded. The vehicle was not repaired. The vehicle was taken to the dealer, where it was confirmed that the undercarriage was corroded. The vehicle was not yet repaired. The contact stated that the dealer refused to repair the vehicle, due to the age of the vehicle. The vehicle remained with the dealer. The contact related the failure to Technical Service Bulletin: 947. The manufacturer was not made aware of the failure. The failure mileage was approximately 190,000.