2021 Hyundai Ioniq Plug-In Hybrid Other or unknown Problems
- Complaints
- 1about this part
- Share
- 20%of 5 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the other or unknown of the 2021 Hyundai Ioniq Plug-In Hybrid, 20% of the 5 complaints for this model year.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The Auto Hold feature on my Hyundai Ioniq malfunctioned, displaying a dashboard warning: AUTO HOLD conditions not met. Press brake pedal. This message randomly appears while driving or stopping, and it deactivates the Auto Hold and Electronic Parking Brake (EPB) functions. In some cases, the car rolls after stopping because the system fails to hold the vehicle. This issue compromises vehicle safety, especially on inclines or during stop-and-go traffic. It puts me, passengers, and other drivers at risk. The problem has occurred multiple times and is unpredictable. …”
NHTSA complaint #11673623, filed 2025-07Other or unknown: other model years
Other parts of the 2021 Hyundai Ioniq Plug-In Hybrid
2 complaintsElectrical system
2 complaintsForward collision avoidance
2 complaintsSeat belts
1 complaintsVehicle speed control
1 complaints
← All problems reported for the 2021 Hyundai Ioniq Plug-In Hybrid
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology