Most common 2021 Hyundai Ioniq Hybrid problems
Share of the 13 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Hyundai Ioniq Hybrid complaints by model year
Best Ioniq Hybrid years: 2019. Years to avoid: 2022, 2020. Compare all years →
NHTSA defect investigations
Federal safety investigators have looked into a possible defect involving the 2021 Hyundai Ioniq Hybrid:
Pedestrian alert sounds
NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles.
What 2021 Hyundai Ioniq Hybrid owners say
Electrical system
The contact owns a 2021 Hyundai Ioniq Hybrid. The contact stated that upon starting the vehicle, the auto-hold warning light would illuminate on the instrument panel. The contact had taken the vehicle to a dealer however, the mechanic was unable to determine the cause of the failure. The contact was informed that he had to pay a diagnostic fee to service the vehicle. The manufacturer was notified of the failure and referred him to another dealer for assistance. The vehicle was not repaired. The failure mileage was approximately 4,000.
The contact owns a 2021 Hyundai Ioniq Hybrid. The contact stated that while driving at various highway speeds, the electronic parking brake and auto hold indicator lights erroneously activated. The cause of the failure was not yet determined. The local dealer was notified of the failure, but no assistance was offered. The manufacturer was not yet contacted. The VIN was not available. The failure mileage was 16,000.
Driver assistance
Two different scenarios with this cruise control are problems with this vehicle. When it is raining the system with the cruise control does not work and the shop told me it happens with other vehicles. A warning light appears when this happens. This last time it was not raining and the cruise control quit working and the warning light came on as well as another system warning light. I showed the picture to the guy at the shop and he said after I showed him the picture he knew what to do, he had to reset the system. Yes, it's available for inspection. When you're driving in traffic on the highway going 65 and the car slows down for no apparent reason, that is a problem. The vehicle has not been inspected.
When driving down the highway the cruise control will turn off and it is during sunny days and has happened many times. The check lane following assist LFA system notice comes on, the smart cruise ctrl conditions not met notice come on, the check smart cruise control system notice comes on, auto hold, EPB and two triangles appear. Happened 4/2, 4/20, 6/9, 6/17. I have told service about it but they say there isn't any problem.
Brakes
The contact owns a 2021 Hyundai Ioniq Hybrid. The contact stated while driving at an undisclosed speed, the electronic parking brake warning light, the auto-hold feature warning light, and other unknown warning lights were illuminated. The contact veered to the side of the road. The contact turned off and restarted the vehicle; however, the failure persisted. The contact was able to continue driving. The vehicle was taken to the local dealer where it was diagnosed that the brake caliper had failed and needed to be replaced; however, parts were not available. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 19,000.
On a recurring basis, the warning lights come on for"AUTO HOLD" and "EPB" or emergency parking brake. Car continually beeps and gives warning until car is reset. During this time, the cruise control will turn off, causing safety issues during travel. Also, the other safety features seem to stop working during the time this warning is activated. Emergency stop, et cetera. Only activated when vehicle is operating under highway mph. Typically local roads with stops/starts trigger this issue. Mechanics have no idea what is wrong with vehicle warning. I see online that this is a common issues with Hyundai Ioniq. A possible recall is needed to investigate/fix this issue as local dealerships arent aware of a solution.
Frequently asked questions
Is the 2021 Hyundai Ioniq Hybrid a good car?
Based on 13 owner complaints filed with NHTSA, the 2021 Ioniq Hybrid rates average: about as many complaints as a typical year of the Ioniq Hybrid at the same age. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2021 Hyundai Ioniq Hybrid?
The electrical system — 7 complaints, 54% of all complaints for this model year, most often about adas › parking assist › sensors. Next are the driver assistance (4) and brakes (3).
How many recalls does the 2021 Hyundai Ioniq Hybrid have?
NHTSA lists no recalls for the 2021 Hyundai Ioniq Hybrid. You can still confirm with your VIN using our VIN recall check.
What are the best and worst years of the Hyundai Ioniq Hybrid?
The best years by complaints, compared at the same age, are 2019. Years to avoid or approach with caution: 2022 and 2020. See the full Hyundai Ioniq Hybrid years comparison.
At what mileage do 2021 Hyundai Ioniq Hybrid problems happen?
The median mileage reported in complaints is about 19,000 miles; 75% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.