The contact owns a 2017 Hyundai Tucson. The contact received notification of NHTSA Campaign Number: 21V727000 (Engine) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The local dealer and the manufacturer were made aware of the issue. The contact had experienced a failure in which the contact was at a yield sign at a complete stop and when the contact depressed on the accelerator pedal, the vehicle suddenly accelerated at an aggressive speed which caused the vehicle to rear-end the vehicle in front. The contact mentioned that she had also experienced a hesitation in speed with the vehicle. The air bags did not deploy. No warning lights illuminated on the vehicle. There were no injuries reported. No police report was filed. The contact was concerned the failure they experienced was related to the recall not being performed on the vehicle. The failure mileage was not available. Vin tool confirms recall incomplete.