2021 Hyundai Ioniq Electric Problems
Owner-reported complaints filed with NHTSA, grouped by component
Data refreshed
What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 2021 Hyundai Ioniq Electric, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Reports by component
Ranked by how many owner reports name each component category
- Electrical266.7%
- Fuel system133.3%
Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.
Each component in detail
What the reports in each category say, in the owners' own words
Electrical
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.
From owner reports, verbatim
VEHICLE SAFETY HAZARD: ACTIVE HIGH-VOLTAGE ISOLATION FAULT (DTC P0AA6) WITH DECEPTIVE DEALER/MANUFACTURER BYPASS & CONCEALMENT. On April 15, 2026, the dealer scanned my 2021 Ioniq EV and uncovered DTC P0AA6 (Hybrid/EV Battery Voltage System Isolation Fault), which denotes a catastrophic high-voltage leak into the chassis. This is a severe safety hazard posing immediate risks of fatal electrocution to occupants, EV battery thermal runaway (fire), or sudden total loss of propulsion at highway speeds. Instead of grounding this dangerous vehicle, the dealership concealed the diagnostic code, withheld the physical invoice, and released the vehicle back to me on April 28, falsely claiming it was "fixed to 100%." They forced me to drive an actively compromised high-voltage system. On May 7, the defect immediately returned while driving. I confronted the dealer on May 8 for merely resetting the car's computer to bypass the safety warning, which is an extremely dangerous fire hazard. The manufacturer has refused to replace the defective EV battery under warranty, or provide alternative transportation. This vehicle has now been grounded and decaying in an open lot for over 95 days. This is a severe systemic manufacturing defect and fraudulent maintenance practice that requires an immediate NHTSA safety investigation.
The contact owns a 2021 Hyundai Ioniq EV. The contact stated that on several occasions the vehicle would not start or could not be restarted after being turned off. The vehicle was towed to the local dealer who was unable to determine the exact cause of the failure but indicated that the failure was related to the 12V battery system. The vehicle was not yet repaired. The manufacturer and local dealer were notified of the failure. The failure mileage was 22,000.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Fuel system
Reports naming fuel storage or delivery — tanks, pumps, lines, injectors and fuel leaks.
From owner reports, verbatim
VEHICLE SAFETY HAZARD: ACTIVE HIGH-VOLTAGE ISOLATION FAULT (DTC P0AA6) WITH DECEPTIVE DEALER/MANUFACTURER BYPASS & CONCEALMENT. On April 15, 2026, the dealer scanned my 2021 Ioniq EV and uncovered DTC P0AA6 (Hybrid/EV Battery Voltage System Isolation Fault), which denotes a catastrophic high-voltage leak into the chassis. This is a severe safety hazard posing immediate risks of fatal electrocution to occupants, EV battery thermal runaway (fire), or sudden total loss of propulsion at highway speeds. Instead of grounding this dangerous vehicle, the dealership concealed the diagnostic code, withheld the physical invoice, and released the vehicle back to me on April 28, falsely claiming it was "fixed to 100%." They forced me to drive an actively compromised high-voltage system. On May 7, the defect immediately returned while driving. I confronted the dealer on May 8 for merely resetting the car's computer to bypass the safety warning, which is an extremely dangerous fire hazard. The manufacturer has refused to replace the defective EV battery under warranty, or provide alternative transportation. This vehicle has now been grounded and decaying in an open lot for over 95 days. This is a severe systemic manufacturing defect and fraudulent maintenance practice that requires an immediate NHTSA safety investigation.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Elsewhere on this vehicle
Data sources
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .