There are 4 owner-reported powertrain & transmission complaints for the 2020 Kia Rioin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
The contact owns a 2020 Kia Rio. The contact stated that while coming to a stoplight, the vehicle unexpectedly stalled. There was no warning light illuminated. The vehicle did not need to be restarted. The vehicle was taken to the dealer; however, the vehicle was not diagnosed or repaired. The contact was informed by the dealer that the failure could not be duplicated. The manufacturer was not made aware of the failure. The approximate failure mileage was 28,000.
I was driving up a hill and it would not go past 20-30 mph, and the rpm will sometimes go up when not accelerating. The transmission does not shift when driving and will sometimes make the car stop and go stop and go continuously. Tried accelerating but the rpm would go up while the mph would not.
The contact owns a 2020 Kia Rio. The contact stated the vehicle was parked at her residence, when entering inside the cab, she noticed the gear shaft was melted. The contact stated she did not visibly see fire. The police did come to her residence and informed the cause of the fire was an electronic failure but they do not file any fire reports. The contact did not contact the fire department. The vehicle was not drivable. The contact towed the vehicle to a local dealer and was made aware of the failure. The vehicle was not diagnosed or repaired. The vehicle was towed back to her residence. The manufacturer had not been informed of the failure. The failure mileage was unknown.
The contact owns a 2020 Kia Rio. The contact stated that he was a former service technician and that while driving and stopping at a stoplight, the traffic light turned green and the contact depressed the accelerator pedal however, the vehicle idled and stalled for a few seconds before inadvertently accelerating and crashing into the vehicle in front. The contact stated that the failure recurred intermittently on several occasions. The contact attempted to take the vehicle to the local dealer to be inspected however, the dealer was unable to inspect the vehicle for a month. The vehicle was not diagnosed nor repaired. The manufacturer was not made aware of the failure. The failure mileage was 41,714.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026