One problem related to transmission noise has been reported for the 2017 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2017 Hyundai Sonata based on all problems reported for the 2017 Sonata.
After transmission was replace in December 2020, noticed starting in Jan 2021, that vehicle did not stay in park and rolled back up to 5 feet from where parked. Pictures from parking lot, 3/6/2021 rolled back 5 feet from where it parked. Mileage on 3/6/21 was 96858. On 4/15/21 we have video with the noise that it is making when in park and rolls back (unable to attach here). Mileage on 4/15/2021 was 97881. Car was parked in a handicap spot at a restaurant. The amount of rollback could cause someone walking behind the vehicle to be crushed or killed.